Bug 515540 - Closing a window from task switcher doesn't update the list correctly
Summary: Closing a window from task switcher doesn't update the list correctly
Status: CONFIRMED
Alias: None
Product: kwin
Classification: Plasma
Component: tabbox (other bugs)
Version First Reported In: 6.5.5
Platform: CachyOS Linux
: NOR minor
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2026-02-05 08:07 UTC by brodino96
Modified: 2026-02-10 17:09 UTC (History)
2 users (show)

See Also:
Latest Commit:
Version Fixed/Implemented In:
Sentry Crash Report:


Attachments
Video displaying the issue (2.49 MB, video/mp4)
2026-02-05 08:07 UTC, brodino96
Details

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Description brodino96 2026-02-05 08:07:33 UTC
Created attachment 189235 [details]
Video displaying the issue

SUMMARY
If you close an application by the X icon from the Task Switcher, it updates the list of currently open windows but most of the times it "hides" some of the windows, when you release the task switcher and open it back again it displays all of them again (correctly)

STEPS TO REPRODUCE
1. Have more than 3 windows open
2. Open the task switcher and close one of the windows with the X button
(It may require to close more than one window, still not sure what discrimates it)

OBSERVED RESULT
Some windows that are still open are hidden

EXPECTED RESULT
All application that are still open should be visible

SOFTWARE/OS VERSIONS
WARNING: radv is not a conformant Vulkan implementation, testing use only.
Operating System: CachyOS Linux
KDE Plasma Version: 6.5.5
KDE Frameworks Version: 6.22.0
Qt Version: 6.10.2
Kernel Version: 6.18.8-3-cachyos (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 7800X3D 8-Core Processor
Memory: 32 GiB of RAM (30.5 GiB usable)
Graphics Processor 1: AMD Radeon RX 9070 XT
Graphics Processor 2: AMD Ryzen 7 7800X3D 8-Core Processor

ADDITIONAL INFORMATION
I've uploaded a small video with the issue
Comment 1 TraceyC 2026-02-10 17:09:49 UTC
Thanks for the bug report, and the video, which is really helpful. I see exactly what's happening.
I'm not able to reproduce the exact problem you're seeing, but I see a slightly different problem

If I have enough applications open to have two rows in the task switcher, if I close enough of them so that it should only show one row, the task switcher disappears entirely. This is likely a different bug, but does share the similarity of things not behaving as expected when the number of items should cause two rows to turn into one

There were recent changes to the Large Icons task switcher, which shouldn't affect this, but mentioning it in case.
https://invent.kde.org/plasma/kdeplasma-addons/-/commit/b6b88a79cbbc2e0379643023943a2592838f71c5