Plan tab empty after changing to Changes and back to Plan

### Short summary

The plan tab only rendered a white page after being previously filled. I just switched tabs to "changes" and back to "plan"

### Affected version or release

v.0.2.8

### Installation context

_No response_

### What happened?

I had a weird one time bug today, which I can't reproduce, (un-)fortunately. But still, I want to report it.

The GitHub Copilot App was in plan mode and created a plan for my. I noticed the tabs "Changes", "Plan" and "Terminal". The tab control was opened with the Plan tab selected and with a filled plan.
After clicking on the "Changes" tab and going back to the Plan tab, the plan disappeared

and I couldn't get it back. Clicking on "view full plan" again also did not refresh the rendering. Only after writing in the chat prompt and updating the plan, I was able to get it back.

I assume that the plan was cached locally but somehow the plan got evicted from the cache?

### Steps to reproduce

_No response_

### Expected behavior

_No response_

### Additional context

_No response_