[UI] Chopping off content when streaming text responses

[philwinder]

There's a bug in the UI somewhere when it starts to stream the response. I can see that the response is streaming fine because in the chat widget I see all the content. But if you look here, look how the first part of the actual message is missing Here's an answer based upon the provided context: In the image below the text starts from this colon.

Once the text stops streaming, it shows the full text.