[Bug] Terminal auto-scrolls to buffer start when model writes output during scroll-up #35415

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1. github-actions

   added

   bugSomething isn't workingSomething isn't working

   duplicateThis issue or pull request already existsThis issue or pull request already exists

   platform:windowsIssue specifically occurs on WindowsIssue specifically occurs on Windows

   area:tui

   on Mar 17, 2026
2. github-actions commented on Mar 17, 2026

   

   github-actionsBot

   on Mar 17, 2026 – with GitHub Actions

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   Found 3 possible duplicate issues:

   1. [BUG] Terminal scrolls to top during agent execution (Windows Terminal + PowerShell) #34794
   2. Chat scrolls to top when Claude sends a message while user is scrolled mid-conversation #34673
   3. Scrolling during streaming output jumps to top of session #35403

   This issue will be automatically closed as a duplicate in 3 days.

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   🤖 Generated with Claude Code
3. yurukusa commented on Mar 17, 2026

   

   yurukusa

   on Mar 17, 2026

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   Two things happening here:

   1. Auto-scroll to bottom on output — Windows Terminal has a setting for this: Settings → Profiles → Defaults → Advanced → toggle off "Automatically scroll to bottom on output". This stops the terminal from chasing new output when you are scrolled up reading history.

   2. Scroll to buffer start — this is a different issue. Claude Code uses cursor positioning escape sequences (\e[H cursor home, \e[s/\e[u save/restore cursor) during status line updates and streaming. Some of these can reset the viewport position to the top of the scrollback buffer rather than just the bottom. This is the more disruptive of the two behaviors.

   For (2), the most reliable workaround is running Claude Code inside tmux or Windows Terminal tabs with separate scroll buffers. tmux isolates the escape sequences to the inner pane, so your outer scrollback is not affected. You can scroll the tmux buffer with prefix + [ while Claude keeps working.

   # Quick tmux setup
   tmux new -s claude
   # Inside tmux, run claude
   # Scroll: Ctrl+B then [ then arrow keys
   # Exit scroll: q
   
4. bogini

   self-assigned this

   on Mar 19, 2026
5. ashwin-ant commented on Apr 19, 2026

   

   ashwin-ant

   on Apr 19, 2026

   Collaborator

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   This was fixed in v2.1.101 — Stopped emitting ERASE_SCROLLBACK (CSI 3J) on full resets in non-fullscreen mode, so terminal scrollback is preserved instead of being wiped (which made the view appear to jump to the top of the session) during streaming. If you're still seeing this in the latest version, please comment with your version and repro and we'll reopen.
6. ashwin-ant

   closed this as completedon Apr 19, 2026
7. github-actions commented on Apr 26, 2026

   

   github-actionsBot

   on Apr 26, 2026 – with GitHub Actions

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   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.
8. github-actions

   locked as resolved and limited conversation to collaborators on Apr 26, 2026