Tab groups not closing

[PaulMcF1987]

Preliminary Checks

• I have read and understood the important section above.
• I have searched existing issues and avoided creating duplicates.
• I am not filing an enhancement request.
• I have checked that this issue cannot be reproduced on Mozilla Firefox.
• I have checked that this issue can be reproduced once I removed all my Mods and Custom CSS.

What happened?

I had a few unpinned tabs that I wanted to keep open for the time being and to save space I decided to group them
Once grouped, I tried to close the group and it would not close

I removed the Mods I am using ant the issue still persists

Expected behavior

On clicking the the group title the this should display/hide the grouped tabs

Actual behavior

The grouped tabs are constantly visible

Steps to reproduce

Open any number of tabs, select all open tabs, right click and select add to group, Select create new group and give it a name.
The tabs will then indent, under the group title but they will not close/hide as intended

Screenshots and videos

Recording.2026-05-11.115905.mp4

Version

1.19.12b

What platform are you seeing the problem on?

Windows - x64

What component is this issue related to?

Tabs

Relevant log output if applicable

[gordonn]

Tab groups are not officially supported in zen. Use folders instead

[PaulMcF1987]

@gordonn Folders are only available to pinned tabs. These are temporary tabs that I only intend to have grouped for a few days.
Also, if groups is a standard function in firefox... why would they not work out the box as they do in firefox?