diff --git a/docSite/content/zh-cn/docs/development/upgrading/4812.md b/docSite/content/zh-cn/docs/development/upgrading/4812.md
index ca97781b20be..45dc70c84736 100644
--- a/docSite/content/zh-cn/docs/development/upgrading/4812.md
+++ b/docSite/content/zh-cn/docs/development/upgrading/4812.md
@@ -9,6 +9,26 @@ weight: 812
 
 ## 更新指南
 
+### 1. 做好数据备份
+
+### 2. 修改镜像
+
+- 更新 FastGPT 镜像 tag: v4.8.12-beta
+- 更新 FastGPT 商业版镜像 tag: v4.8.12-beta
+- Sandbox 镜像，可以不更新
+
+
+### 3. 商业版执行初始化
+
+从任意终端，发起 1 个 HTTP 请求。其中 {{rootkey}} 替换成环境变量里的 `rootkey`；{{host}} 替换成**FastGPT 商业版域名**。
+
+```bash
+curl --location --request POST 'https://{{host}}/api/admin/init/4812' \
+--header 'rootkey: {{rootkey}}' \
+--header 'Content-Type: application/json'
+```
+
+会初始化应用和知识库的成员组数据。
 
 ## 更新说明
 
@@ -29,3 +49,6 @@ weight: 812
 15. 修复 - AI 响应为空时，会造成 LLM  历史记录合并。
 16. 修复 - 用户交互节点未阻塞流程。
 17. 修复 - 新建 APP，有时候会导致空指针报错。
+18. 修复 - 拥有多个循环节点时，错误运行。
+19. 修复 - 循环节点中修改变量，无法传递。
+20. 修复 - 非 stream 模式，嵌套子应用/插件执行时无法获取子应用响应。
diff --git a/packages/global/core/workflow/template/system/variableUpdate/index.tsx b/packages/global/core/workflow/template/system/variableUpdate/index.tsx
index 82b486d00ad0..3ad693f67541 100644
--- a/packages/global/core/workflow/template/system/variableUpdate/index.tsx
+++ b/packages/global/core/workflow/template/system/variableUpdate/index.tsx
@@ -18,7 +18,7 @@ export const VariableUpdateNode: FlowNodeTemplateType = {
   name: i18nT('workflow:variable_update'),
   intro: i18nT('workflow:update_specified_node_output_or_global_variable'),
   showStatus: false,
-  isTool: false,
+  isTool: true,
   version: '481',
   inputs: [
     {
diff --git a/packages/service/core/workflow/dispatch/agent/runTool/index.ts b/packages/service/core/workflow/dispatch/agent/runTool/index.ts
index 325f1260b016..2b34f86dd8c3 100644
--- a/packages/service/core/workflow/dispatch/agent/runTool/index.ts
+++ b/packages/service/core/workflow/dispatch/agent/runTool/index.ts
@@ -211,18 +211,7 @@ export const dispatchRunTools = async (props: DispatchToolModuleProps): Promise<
   });
 
   // flat child tool response
-  let newVariables: Record<string, any> = props.variables;
-  const childToolResponse = dispatchFlowResponse
-    .map((item) => {
-      // Computed new variables
-      newVariables = {
-        ...newVariables,
-        ...item.newVariables
-      };
-
-      return item.flowResponses;
-    })
-    .flat();
+  const childToolResponse = dispatchFlowResponse.map((item) => item.flowResponses).flat();
 
   // concat tool usage
   const totalPointsUsage =
@@ -261,7 +250,6 @@ export const dispatchRunTools = async (props: DispatchToolModuleProps): Promise<
       },
       ...flatUsages
     ],
-    [DispatchNodeResponseKeyEnum.newVariables]: newVariables,
     [DispatchNodeResponseKeyEnum.interactive]: toolWorkflowInteractiveResponse
   };
 };
diff --git a/packages/service/core/workflow/dispatch/agent/runTool/toolChoice.ts b/packages/service/core/workflow/dispatch/agent/runTool/toolChoice.ts
index 09fb79ed21d3..b730ae66a41c 100644
--- a/packages/service/core/workflow/dispatch/agent/runTool/toolChoice.ts
+++ b/packages/service/core/workflow/dispatch/agent/runTool/toolChoice.ts
@@ -27,7 +27,7 @@ import { getNanoid, sliceStrStartEnd } from '@fastgpt/global/common/string/tools
 import { addLog } from '../../../../../common/system/log';
 import { toolValueTypeList } from '@fastgpt/global/core/workflow/constants';
 import { WorkflowInteractiveResponseType } from '@fastgpt/global/core/workflow/template/system/interactive/type';
-import { ChatItemValueTypeEnum, ChatRoleEnum } from '@fastgpt/global/core/chat/constants';
+import { ChatItemValueTypeEnum } from '@fastgpt/global/core/chat/constants';
 
 type ToolRunResponseType = {
   toolRunResponse: DispatchFlowResponse;
diff --git a/packages/service/core/workflow/dispatch/index.ts b/packages/service/core/workflow/dispatch/index.ts
index 39a26ff10c62..9d1f9fa51e3b 100644
--- a/packages/service/core/workflow/dispatch/index.ts
+++ b/packages/service/core/workflow/dispatch/index.ts
@@ -41,7 +41,8 @@ import { dispatchPluginOutput } from './plugin/runOutput';
 import { removeSystemVariable, valueTypeFormat } from './utils';
 import {
   filterWorkflowEdges,
-  checkNodeRunStatus
+  checkNodeRunStatus,
+  textAdaptGptResponse
 } from '@fastgpt/global/core/workflow/runtime/utils';
 import { ChatNodeUsageType } from '@fastgpt/global/support/wallet/bill/type';
 import { dispatchRunTools } from './agent/runTool/index';
@@ -161,6 +162,20 @@ export async function dispatchWorkFlow(data: Props): Promise<DispatchFlowRespons
     res.setHeader('Access-Control-Allow-Origin', '*');
     res.setHeader('X-Accel-Buffering', 'no');
     res.setHeader('Cache-Control', 'no-cache, no-transform');
+
+    // 10s sends a message to prevent the browser from thinking that the connection is disconnected
+    const sendStreamTimerSign = () => {
+      setTimeout(() => {
+        props?.workflowStreamResponse?.({
+          event: SseResponseEventEnum.answer,
+          data: textAdaptGptResponse({
+            text: ''
+          })
+        });
+        sendStreamTimerSign();
+      }, 10000);
+    };
+    sendStreamTimerSign();
   }
 
   variables = {
@@ -592,56 +607,60 @@ export async function dispatchWorkFlow(data: Props): Promise<DispatchFlowRespons
     };
   }
 
-  // start process width initInput
-  const entryNodes = runtimeNodes.filter((item) => item.isEntry);
-  // reset entry
-  runtimeNodes.forEach((item) => {
-    // Interactive node is not the entry node, return interactive result
-    if (
-      item.flowNodeType !== FlowNodeTypeEnum.userSelect &&
-      item.flowNodeType !== FlowNodeTypeEnum.formInput &&
-      item.flowNodeType !== FlowNodeTypeEnum.tools
-    ) {
-      item.isEntry = false;
-    }
-  });
-  await Promise.all(entryNodes.map((node) => checkNodeCanRun(node)));
-
-  // focus try to run pluginOutput
-  const pluginOutputModule = runtimeNodes.find(
-    (item) => item.flowNodeType === FlowNodeTypeEnum.pluginOutput
-  );
-  if (pluginOutputModule && props.mode !== 'debug') {
-    await nodeRunWithActive(pluginOutputModule);
-  }
+  try {
+    // start process width initInput
+    const entryNodes = runtimeNodes.filter((item) => item.isEntry);
+    // reset entry
+    runtimeNodes.forEach((item) => {
+      // Interactive node is not the entry node, return interactive result
+      if (
+        item.flowNodeType !== FlowNodeTypeEnum.userSelect &&
+        item.flowNodeType !== FlowNodeTypeEnum.formInput &&
+        item.flowNodeType !== FlowNodeTypeEnum.tools
+      ) {
+        item.isEntry = false;
+      }
+    });
+    await Promise.all(entryNodes.map((node) => checkNodeCanRun(node)));
 
-  // Interactive node
-  const interactiveResult = (() => {
-    if (nodeInteractiveResponse) {
-      const interactiveAssistant = handleInteractiveResult({
-        entryNodeIds: nodeInteractiveResponse.entryNodeIds,
-        interactiveResponse: nodeInteractiveResponse.interactiveResponse
-      });
-      chatAssistantResponse.push(interactiveAssistant);
-      return interactiveAssistant.interactive;
+    // focus try to run pluginOutput
+    const pluginOutputModule = runtimeNodes.find(
+      (item) => item.flowNodeType === FlowNodeTypeEnum.pluginOutput
+    );
+    if (pluginOutputModule && props.mode !== 'debug') {
+      await nodeRunWithActive(pluginOutputModule);
     }
-  })();
 
-  return {
-    flowResponses: chatResponses,
-    flowUsages: chatNodeUsages,
-    debugResponse: {
-      finishedNodes: runtimeNodes,
-      finishedEdges: runtimeEdges,
-      nextStepRunNodes: debugNextStepRunNodes
-    },
-    workflowInteractiveResponse: interactiveResult,
-    [DispatchNodeResponseKeyEnum.runTimes]: workflowRunTimes,
-    [DispatchNodeResponseKeyEnum.assistantResponses]:
-      mergeAssistantResponseAnswerText(chatAssistantResponse),
-    [DispatchNodeResponseKeyEnum.toolResponses]: toolRunResponse,
-    newVariables: removeSystemVariable(variables)
-  };
+    // Interactive node
+    const interactiveResult = (() => {
+      if (nodeInteractiveResponse) {
+        const interactiveAssistant = handleInteractiveResult({
+          entryNodeIds: nodeInteractiveResponse.entryNodeIds,
+          interactiveResponse: nodeInteractiveResponse.interactiveResponse
+        });
+        chatAssistantResponse.push(interactiveAssistant);
+        return interactiveAssistant.interactive;
+      }
+    })();
+
+    return {
+      flowResponses: chatResponses,
+      flowUsages: chatNodeUsages,
+      debugResponse: {
+        finishedNodes: runtimeNodes,
+        finishedEdges: runtimeEdges,
+        nextStepRunNodes: debugNextStepRunNodes
+      },
+      workflowInteractiveResponse: interactiveResult,
+      [DispatchNodeResponseKeyEnum.runTimes]: workflowRunTimes,
+      [DispatchNodeResponseKeyEnum.assistantResponses]:
+        mergeAssistantResponseAnswerText(chatAssistantResponse),
+      [DispatchNodeResponseKeyEnum.toolResponses]: toolRunResponse,
+      newVariables: removeSystemVariable(variables)
+    };
+  } catch (error) {
+    return Promise.reject(error);
+  }
 }
 
 /* get system variable */
diff --git a/packages/service/core/workflow/dispatch/loop/runLoop.ts b/packages/service/core/workflow/dispatch/loop/runLoop.ts
index d6c25b761e27..58711c834047 100644
--- a/packages/service/core/workflow/dispatch/loop/runLoop.ts
+++ b/packages/service/core/workflow/dispatch/loop/runLoop.ts
@@ -7,6 +7,7 @@ import {
 import { dispatchWorkFlow } from '..';
 import { DispatchNodeResponseKeyEnum } from '@fastgpt/global/core/workflow/runtime/constants';
 import { AIChatItemValueItemType, ChatHistoryItemResType } from '@fastgpt/global/core/chat/type';
+import { cloneDeep } from 'lodash';
 
 type Props = ModuleDispatchProps<{
   [NodeInputKeyEnum.loopInputArray]: Array<any>;
@@ -19,6 +20,7 @@ type Response = DispatchNodeResultType<{
 export const dispatchLoop = async (props: Props): Promise<Response> => {
   const {
     params,
+    runtimeEdges,
     runtimeNodes,
     user,
     node: { name }
@@ -28,7 +30,10 @@ export const dispatchLoop = async (props: Props): Promise<Response> => {
   if (!Array.isArray(loopInputArray)) {
     return Promise.reject('Input value is not an array');
   }
-  if (loopInputArray.length > 50) {
+  const maxLength = process.env.WORKFLOW_MAX_LOOP_TIMES
+    ? Number(process.env.WORKFLOW_MAX_LOOP_TIMES)
+    : 50;
+  if (loopInputArray.length > maxLength) {
     return Promise.reject('Input array length cannot be greater than 50');
   }
 
@@ -39,27 +44,25 @@ export const dispatchLoop = async (props: Props): Promise<Response> => {
   let newVariables: Record<string, any> = props.variables;
 
   for await (const item of loopInputArray) {
+    runtimeNodes.forEach((node) => {
+      if (
+        childrenNodeIdList.includes(node.nodeId) &&
+        node.flowNodeType === FlowNodeTypeEnum.loopStart
+      ) {
+        node.isEntry = true;
+        node.inputs = node.inputs.map((input) =>
+          input.key === NodeInputKeyEnum.loopStartInput
+            ? {
+                ...input,
+                value: item
+              }
+            : input
+        );
+      }
+    });
     const response = await dispatchWorkFlow({
       ...props,
-      runtimeNodes: runtimeNodes.map((node) =>
-        node.flowNodeType === FlowNodeTypeEnum.loopStart
-          ? {
-              ...node,
-              isEntry: true,
-              inputs: node.inputs.map((input) =>
-                input.key === NodeInputKeyEnum.loopStartInput
-                  ? {
-                      ...input,
-                      value: item
-                    }
-                  : input
-              )
-            }
-          : {
-              ...node,
-              isEntry: false
-            }
-      )
+      runtimeEdges: cloneDeep(runtimeEdges)
     });
 
     const loopOutputValue = response.flowResponses.find(
diff --git a/packages/service/core/workflow/dispatch/plugin/run.ts b/packages/service/core/workflow/dispatch/plugin/run.ts
index 19f53aed021a..32dad35aeffd 100644
--- a/packages/service/core/workflow/dispatch/plugin/run.ts
+++ b/packages/service/core/workflow/dispatch/plugin/run.ts
@@ -113,11 +113,10 @@ export const dispatchRunPlugin = async (props: RunPluginProps): Promise<RunPlugi
   }
 
   const usagePoints = await computedPluginUsage(plugin, flowUsages);
-  const childStreamResponse = system_forbid_stream ? false : props.stream;
 
   return {
     // 嵌套运行时，如果 childApp stream=false，实际上不会有任何内容输出给用户，所以不需要存储
-    assistantResponses: childStreamResponse ? assistantResponses : [],
+    assistantResponses: system_forbid_stream ? [] : assistantResponses,
     // responseData, // debug
     [DispatchNodeResponseKeyEnum.runTimes]: runTimes,
     [DispatchNodeResponseKeyEnum.nodeResponse]: {
diff --git a/packages/service/core/workflow/dispatch/plugin/runApp.ts b/packages/service/core/workflow/dispatch/plugin/runApp.ts
index 89eacf1356a9..e4f31c6b4b78 100644
--- a/packages/service/core/workflow/dispatch/plugin/runApp.ts
+++ b/packages/service/core/workflow/dispatch/plugin/runApp.ts
@@ -124,7 +124,7 @@ export const dispatchRunAppNode = async (props: Props): Promise<Response> => {
   const usagePoints = flowUsages.reduce((sum, item) => sum + (item.totalPoints || 0), 0);
 
   return {
-    assistantResponses: childStreamResponse ? assistantResponses : [],
+    assistantResponses: system_forbid_stream ? [] : assistantResponses,
     [DispatchNodeResponseKeyEnum.runTimes]: runTimes,
     [DispatchNodeResponseKeyEnum.nodeResponse]: {
       moduleLogo: appData.avatar,
diff --git a/projects/app/.env.template b/projects/app/.env.template
index 4d8d8175c510..0bc4cbbc13f6 100644
--- a/projects/app/.env.template
+++ b/projects/app/.env.template
@@ -39,4 +39,6 @@ STORE_LOG_LEVEL=warn
 
 # 安全配置
 # 工作流最大运行次数，避免极端的死循环情况
-WORKFLOW_MAX_RUN_TIMES=500
\ No newline at end of file
+WORKFLOW_MAX_RUN_TIMES=500
+# 循环最大运行次数，避免极端的死循环情况
+WORKFLOW_MAX_LOOP_TIMES=50
\ No newline at end of file
diff --git a/projects/app/package.json b/projects/app/package.json
index 6d104964e6cb..51b42cf002a3 100644
--- a/projects/app/package.json
+++ b/projects/app/package.json
@@ -1,6 +1,6 @@
 {
   "name": "app",
-  "version": "4.8.11",
+  "version": "4.8.12",
   "private": false,
   "scripts": {
     "dev": "next dev",
diff --git a/projects/app/src/components/common/folder/MoveModal.tsx b/projects/app/src/components/common/folder/MoveModal.tsx
index b89ab6bd491a..a1d6f42c1805 100644
--- a/projects/app/src/components/common/folder/MoveModal.tsx
+++ b/projects/app/src/components/common/folder/MoveModal.tsx
@@ -172,7 +172,11 @@ const MoveModal = ({ moveResourceId, title, server, onConfirm, onClose, moveHint
       onClose={onClose}
     >
       <ModalBody flex={'1 0 0'} overflow={'auto'} minH={'400px'}>
-        {moveHint && <LightTip text={moveHint} />}
+        {moveHint && (
+          <Box mb={1}>
+            <LightTip text={moveHint} />
+          </Box>
+        )}
         <RenderList list={folderList} />
       </ModalBody>
       <ModalFooter>
diff --git a/projects/app/src/pages/app/detail/components/Workflow/Header.tsx b/projects/app/src/pages/app/detail/components/Workflow/Header.tsx
index bb4f7af612ea..53d54ac70a39 100644
--- a/projects/app/src/pages/app/detail/components/Workflow/Header.tsx
+++ b/projects/app/src/pages/app/detail/components/Workflow/Header.tsx
@@ -34,7 +34,11 @@ const Header = () => {
   const { t } = useTranslation();
   const { isPc } = useSystem();
   const router = useRouter();
-  const { toast } = useToast();
+  const { toast: backSaveToast } = useToast({
+    containerStyle: {
+      mt: '60px'
+    }
+  });
 
   const { appDetail, onSaveApp, currentTab } = useContextSelector(AppContext, (v) => v);
   const isV2Workflow = appDetail?.version === 'v2';
@@ -273,7 +277,7 @@ const Header = () => {
               await onClickSave({});
               onCloseBackConfirm();
               onBack();
-              toast({
+              backSaveToast({
                 status: 'success',
                 title: t('app:saved_success'),
                 position: 'top-right'