Incessant Scrolling during long running operations.

[BrainSlugs83]

Describe the bug

It seems that during long running operations, copilot will start scrolling the terminal all over the place; probably in an attempt to give me a seizure. Pretty sure this is the first phase of the robot uprising...

Note, this is not just "it's writing to the console very quickly and scrolling", it's scrolling back up through pages of old stuff, and back down to the bottom, and then back up, and then back down, etc... it's really painful to watch, because it does it over and over and over, for minutes at a time... Sometimes zooming in or out helps... but sometimes that just makes all the text disappear...

Copilot.Scrolling.crazily.webm

Affected version

GitHub Copilot CLI 0.0.413-0.

Steps to reproduce the behavior

1. Introduce a long running operation (like implement from speckit).
2. Watch the console go nuts.
3. Try not to have any seizures.
4. ... or headaches.

Expected behavior

The console does not jump around all over the place during long agentic tasks / operations.

Additional context

• Windows 11 Enterprise 24H2
• Windows Terminal Version: 1.23.20211.0
• Font: Hasklug Nerd Font Mono (oh-my-posh)
• oh-my-posh 29.3.0

What else do you need?

[EvanBoyle]

@BrainSlugs83 we're in the progress of migrating our TUI off of the existing rendering layer. Curious if running the CLI with the --alt-screen flag solves this issue for you?

[myn]

Can confirm same behavior in Ubuntu. Zsh, Konsole terminal.

[nikswamy]

Confirm same behavior in Ubuntu with WSL, Bash

[eppsilon]

I am seeing this on macOS with ZSH/iTerm.

Update: I tried --alt-screen but am still seeing the issue.

[AntonSigur]

This is SO annoying. I have lost a work in progress because of this.

[BrainSlugs83]

Confirm same behavior in Ubuntu with WSL, Bash

I also see it in WSL/PoweShell and WSL/Bash.

@BrainSlugs83 we're in the progress of migrating our TUI off of the existing rendering layer. Curious if running the CLI with the --alt-screen flag solves this issue for you?

I'll try it tonight.

[nikswamy]

I have been using alt-screen since yesterday in dozens of sessions and have not experienced the issue since then

[BrainSlugs83]

Hmmm... at first glance, it appears to fix the immediate issue... but:

1. It disables all font resizing... (CTRL+mousewheel) -- I'm not sure that this is a bad thing... need to play with it more...
2. Seems like it exacerbates Animated Banner borked in experimental mode #1694, making it happen in non-experimental mode...

I'll continue to play with this tomorrow.
Edit: I continued to play with it tonight. 😅 -- I haven't seen this exact bug... but a lot of the other visual glitches and twerks are still around... I should probably be logging bugs for those tool (command bar moving around / disappearing; tables coming in completely managed until it finishes, etc.)

[fassn]

Same issue on Ubuntu 24.04 with ZSH and Wayland. Though, by being very patient and moving things around it stops after a while. I haven't figured out a pattern to make it stop consistently.

[buacanning]

its so annoying indeed