[BUG] 2.1.78 breaks previously working notifications in iterm2 + tmux
Status Fixed / completed
Reported on v2.1.78
Maintainer reply ✓ Yes — claude[bot]
Activity 5 comments · opened Mar 31, 2026 · closed Apr 16, 2026
💡 Likely answer: A maintainer (claude[bot], contributor)
responded on this thread — see the highlighted reply below.
Preflight Checklist
- [x] I have searched existing issues and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code
What's Wrong?
In 2.1.78+, notifications don't work in my setup (iterm2 + tmux). They do work in 2.1.77 and below.
Instead, i see notification text appear the bottom of the terminal (which corrupts the termianl output)
What Should Happen?
Notifications should appear
Error Messages/Logs
<img width="336" height="33" alt="Image" src="https://github.com/user-attachments/assets/f7097489-14f1-4b0e-aff2-737e194cc9cd" />
Steps to Reproduce
- Use iterm2 with all notification settings enabled correctly
- tmux -CC
tmux set -g allow-passthrough all(if on newer tmux)- launch claude
- wait for claude to notify you
Claude Model
None
Is this a regression?
Yes, this worked in a previous version
Last Working Version
2.1.77
Claude Code Version
2.1.81
Platform
AWS Bedrock
Operating System
macOS
Terminal/Shell
iTerm2
Additional Information
_No response_
5 Comments
Found 3 possible duplicate issues:
This issue will be automatically closed as a duplicate in 3 days.
🤖 Generated with Claude Code
this is not a dupe. https://github.com/anthropics/claude-code/issues/19976 is _related_, but that is tracking general support for notifications, whereas this issue is tracking an explicit regression in 2.1.78
still happening in 2.1.85
This issue was fixed as of version 2.1.111.
This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.