Up/down prompt history navigation causes extra ``` in code attachments

[Jurredr]

Problem

When going to a previous prompt in history using the up or down arrows, code attachments suddenly have ``` attached to both the start and the end of the code block.

Steps to reproduce the issue

Send a message with code attachment, then go to that message in history by pressing the up arrow in the prompt input.

Expected behavior

The code attachment block should look the same as when initially attached (so without ``` visible at the start and end).

System details

Behaviour is visible in both VSCode and JetBrains. However, on the web example app it does not seem to happen.

• OS:
• Tested enviroment:
  • Web (Demo app)
  • VSCode Amazon Q Chat
  • JetBrains IntelliJ Amazon Q Chat
• Enviroment extension version (if applicable):
• Enviroment is remote