Muse Spark 1.3 Bug

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1

When using the Muse Spark 1.3 model within an agent, it frequently stops working automatically if the “thinking” process exceeds 11 minutes, failing to execute the file editing operation

In Agent mode with Muse Spark 1.3, a normal coding task is cut off after about 11 minutes. The agent never reaches a write/edit tool call. The chat just stops.
This does not look like hitting the Other Models usage pool. There is no “usage limit” / “rate limit” banner. The run simply ends after sitting in the thinking/planning phase.
Muse Spark 1.3 often does not stream a thinking chain

2

Hi there!

We detected that this may be a bug report, so we’ve moved your post to the Bug Reports category.

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Where does the bug appear (feature/product)?

  • Editor, Tab & Chat (autocomplete, Composer, in-editor agent)
  • Terminal & commands
  • Models, pricing & API keys (availability, Auto/Max, BYOK/Bedrock)
  • MCP & tools
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Version Information

  • For Cursor IDE: Menu → About Cursor → Copy
  • For Cursor CLI: Run agent about in your terminal
IDE:
Version: 2.xx.x
VSCode Version: 1.105.1
Commit: ......

CLI:
CLI Version 2026.01.17-d239e66

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Does this stop you from using Cursor?

  • Yes - Cursor is unusable
  • Sometimes - I can sometimes use Cursor
  • No - Cursor works, but with this issue

The more details you provide, the easier it is for us to reproduce and fix the issue. Thanks!

18

Hi @Steven!

Thanks for the report. I’ve tried to reproduce this, but haven’t been successful so far. If you have any examples of requests that made Muse think for a long time on Max mode, I’d love to try and reproduce them!