Scrolling does not work

[ohmydds]

Describe the bug

I am unsure of an exact date when I first noticed this (maybe 1.0.61 - Add full screen scrollbar?) but I can no longer scroll back through the conversation. I stopped using copilot in my tmux tab because I couldn't scroll up. Now it happens in my other non-tmux terminal tabs.

Additionally, when copy/pasting for later usage in notes or for sharing, the text now contains the scroll bar which adds a ton of whitespace.

Small example of the copy/paste issue (scroll right in this code block):

   2. download bundle from S3                                                                                                                                                   ┃
   3. verify SHA256                                                                                                                                                             ┃

Is there a way to disable this functionality?

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MacOS Tahoe 26.5.1
zsh 5.9 (arm64-apple-darwin25.0)
Terminal.app
GitHub Copilot CLI 1.0.63.

Affected version

GitHub Copilot CLI 1.0.63.

Steps to reproduce the behavior

• Ask copilot questions
• Try to scroll up - the entire terminal scrolls, not just the conversation.
• Copy/paste from the conversation - a lot of whitespace and | characters are copied.

Expected behavior

Ability to scroll back through the conversation. Ability to copy/paste text without the additional whitespace or scrollbar characters.

Additional context

No response

[ohmydds]

Using --mouse=on and Cmd + r to toggle mouse reporting seems to resolve this issue