diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5727323c..b3cb82dd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
 - Fix `pf.eql/map-select` case on map container at query
 - Fix spec for `pco/?`
 - Merge params when merging nodes on planner (issue #216)
+- Ensure all instances of same resolver in same graph have same params (issue #211)
 
 ## [2023.08.22-alpha]
 - BREAKING: `::p.error/missing-output` is now converged to `::p.error/attribute-missing` (issue #149)
diff --git a/src/main/com/wsscode/pathom3/connect/planner.cljc b/src/main/com/wsscode/pathom3/connect/planner.cljc
index 50fde443..503ff4d6 100644
--- a/src/main/com/wsscode/pathom3/connect/planner.cljc
+++ b/src/main/com/wsscode/pathom3/connect/planner.cljc
@@ -1768,6 +1768,18 @@
             (assoc ::placeholder-use-source-entity? true)))
         index-ast))))
 
+(defn ensure-resolver-consistent-params [graph]
+  (reduce
+    (fn [graph' node-ids]
+      (if (> (count node-ids) 1)
+        (let [params (transduce (map #(get-node graph' % ::params)) merge node-ids)]
+          (if (seq params)
+            (reduce #(assoc-node % %2 ::params params) graph' node-ids)
+            graph'))
+        graph'))
+    graph
+    (vals (::index-resolver->nodes graph))))
+
 (>defn compute-run-graph
   "Generates a run plan for a given environment, the environment should contain the
   indexes in it (::pc/index-oir and ::pc/index-resolvers). It computes a plan to execute
@@ -1853,7 +1865,10 @@
               (optimize-graph env')
 
               true
-              (mark-fast-placeholder-processes env'))))
+              (mark-fast-placeholder-processes env')
+
+              true
+              (ensure-resolver-consistent-params))))
        (:edn-query-language.ast/node env)))))
 
 ; endregion
diff --git a/test/com/wsscode/pathom3/connect/planner_test.cljc b/test/com/wsscode/pathom3/connect/planner_test.cljc
index 337e4fda..966f595e 100644
--- a/test/com/wsscode/pathom3/connect/planner_test.cljc
+++ b/test/com/wsscode/pathom3/connect/planner_test.cljc
@@ -1610,7 +1610,59 @@
              :com.wsscode.pathom3.connect.planner/user-request-shape {:a {}, :b {}},
              :com.wsscode.pathom3.connect.planner/index-resolver->nodes {a #{1}},
              :com.wsscode.pathom3.connect.planner/index-attrs {:a #{1}, :b #{1}},
-             :com.wsscode.pathom3.connect.planner/root 1}))))
+             :com.wsscode.pathom3.connect.planner/root 1})))
+
+  (testing "all resolver calls from same resolver must have consistent parameters"
+    (check (=> '{:com.wsscode.pathom3.connect.planner/nodes {1 {:com.wsscode.pathom3.connect.operation/op-name email-body,
+                                                                :com.wsscode.pathom3.connect.planner/expects {:email/body {}},
+                                                                :com.wsscode.pathom3.connect.planner/input {},
+                                                                :com.wsscode.pathom3.connect.planner/node-id 1,
+                                                                :com.wsscode.pathom3.connect.planner/params {:text? true},
+                                                                :com.wsscode.pathom3.connect.planner/node-parents #{6}},
+                                                             2 {:com.wsscode.pathom3.connect.operation/op-name email-valid?,
+                                                                :com.wsscode.pathom3.connect.planner/expects {:email/valid? {}},
+                                                                :com.wsscode.pathom3.connect.planner/input {:email/body {},
+                                                                                                            :email/subject {}},
+                                                                :com.wsscode.pathom3.connect.planner/node-id 2,
+                                                                :com.wsscode.pathom3.connect.planner/node-parents #{5}},
+                                                             3 {:com.wsscode.pathom3.connect.operation/op-name email-body,
+                                                                :com.wsscode.pathom3.connect.planner/expects {:email/body {}},
+                                                                :com.wsscode.pathom3.connect.planner/input {},
+                                                                :com.wsscode.pathom3.connect.planner/node-id 3,
+                                                                :com.wsscode.pathom3.connect.planner/params {:text? true},
+                                                                :com.wsscode.pathom3.connect.planner/node-parents #{5}},
+                                                             4 {:com.wsscode.pathom3.connect.operation/op-name email-subject,
+                                                                :com.wsscode.pathom3.connect.planner/expects {:email/subject {}},
+                                                                :com.wsscode.pathom3.connect.planner/input {},
+                                                                :com.wsscode.pathom3.connect.planner/node-id 4,
+                                                                :com.wsscode.pathom3.connect.planner/node-parents #{5}},
+                                                             5 {:com.wsscode.pathom3.connect.planner/node-id 5,
+                                                                :com.wsscode.pathom3.connect.planner/run-and #{4 3},
+                                                                :com.wsscode.pathom3.connect.planner/run-next 2,
+                                                                :com.wsscode.pathom3.connect.planner/node-parents #{6}},
+                                                             6 {:com.wsscode.pathom3.connect.planner/node-id 6,
+                                                                :com.wsscode.pathom3.connect.planner/run-and #{1 5}}},
+                 :com.wsscode.pathom3.connect.planner/index-ast {:email/body {:type :prop,
+                                                                              :dispatch-key :email/body,
+                                                                              :key :email/body,
+                                                                              :params {:text? true}},
+                                                                 :email/valid? {:type :prop,
+                                                                                :dispatch-key :email/valid?,
+                                                                                :key :email/valid?}},
+                 :com.wsscode.pathom3.connect.planner/user-request-shape {:email/body {}, :email/valid? {}},
+                 :com.wsscode.pathom3.connect.planner/index-resolver->nodes {email-body #{1 3}, email-valid? #{2}, email-subject #{4}},
+                 :com.wsscode.pathom3.connect.planner/index-attrs {:email/body #{1 3}, :email/valid? #{2}, :email/subject #{4}},
+                 :com.wsscode.pathom3.connect.planner/root 6}
+               (compute-run-graph
+                 {::pci/index-oir '{:email/body
+                                    {{} #{email-body}},
+                                    :email/subject
+                                    {{} #{email-subject}},
+                                    :email/valid?
+                                    {{:email/body {}, :email/subject {}}
+                                     #{email-valid?}}}
+                  ::eql/query     ['(:email/body {:text? true})
+                                   :email/valid?]})))))
 
 (deftest compute-run-graph-optimize-test
   (testing "optimize AND nodes"