If >4 sessions in parallel, app keeps crashing... then loses sessions, making it unusable.

What version of the Codex App are you using (From “About Codex” dialog)?

Version 26.422.21637 (2056)

What subscription do you have?

Biggest thing you got

What platform is your computer?

Darwin 25.3.0 arm64 arm

What issue are you seeing?

Thinking shimmer stuck, can't interact with anything anymore, but each session still shows active spinners... only way to get out is to force quit.

What steps can reproduce the bug?

create >4 sessions that run in parallel, push some PRs, create a plan in one (maybe it happens if >x session invoke another plan, however, also happened when I simply instructured it... all use GPT 5.5 extra high + fast enabled by defaul.t

What is the expected behavior?

just fugging works to run >4 sessions in parallel... Ideally >10 on 5.5 xHigh

Additional information

_No response_