Bug 509547

Summary:	Pinned Task Manager icon disappears when closing an app while its cursor launch feedback animation is still playing; icon re-appears after the animation ends
Product:	[Plasma] plasmashell	Reporter:	Nickolas Gupton <nickolas>
Component:	Task Manager and Icons-Only Task Manager widgets	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	CONFIRMED ---
Severity:	minor	CC:	kdedev, nate, niccolo.venerandi, qydwhotmail
Priority:	NOR
Version First Reported In:	6.4.5
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Nickolas Gupton 2025-09-16 03:45:34 UTC

SUMMARY
When closing an app sometimes the panel icon disappears, only to reappear a few seconds later with no further input from myself. Not meaning the ephemeral icons for open programs, meaning the saved ones that show even when the program is not open.

The app I've been able to reproduce this the most reliably with has been the Brave browser, it doesn't happen every time but I can open and close the browser a few times and it will happen. I don't think this is a Brave specific issue though, since it has happened to me with Discord and Steam as well, though (I've at least noticed it) less often than I can make that happen with Brave.

STEPS TO REPRODUCE
1. Close an app
2. Watch its panel icon disappear
3. Wait a few seconds and watch it reappear back in its saved location

OBSERVED RESULT
The icon disappears, reappearing a few moments later.

EXPECTED RESULT
The icon should stay there.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 6.4.5
KDE Frameworks Version: 6.18.0
Qt Version: 6.9.2
Kernel Version: 6.16.7-zen1-1-zen (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 7 3800X 8-Core Processor
Memory: 64 GiB of RAM (62.7 GiB usable)
Graphics Processor: AMD Radeon RX 6700 XT

ADDITIONAL INFORMATION
I'm not really sure what other logs may be helpful for this, if you want any just let me know what you'd need. I can also record a video of this happening if it would help.

Comment 1 Nickolas Gupton 2025-09-16 04:04:09 UTC

Went ahead and just recorded it, hopefully this explains the issue better than I could. You can see the first time it didn't happen to me, but trying the second and third time it happened. I didn't notice the bouncing icon near the pointer before though, maybe thats a clue for whats happening here? I'm not really sure what that animation is supposed to be telling me. 

Tried to upload this as an attachment on this bug, but the file was too large. 
Uploaded to YouTube instead: https://www.youtube.com/watch?v=DKnGkprXUPM

Comment 2 Nate Graham 2025-09-16 22:01:19 UTC

It actually looks like the icon is disappearing when the app launches, and then after it closes, the icon comes back. Can you reproduce that?

This is an Icont-Only Task Manager, right? Not an Icons and Text Task Manager?

Comment 3 Nickolas Gupton 2025-09-16 23:05:48 UTC

Its when the application closes, sorry I had tried to make the window small enough so the task bar wouldn't hide but it did anyway. Re-recorded a video with the window a lot smaller so it shows it more clearly: https://www.youtube.com/watch?v=FXnup6nBcjI

The name it shows for that when I open the edit mode is "Icons-Only Task Manager".

Comment 4 Nickolas Gupton 2025-09-16 23:19:43 UTC

Actually with a bit more testing I think it is directly related to the bouncing icon near the pointer, if I wait until thats finished before closing the app the icon stays where it should be. However closing the application while that animation is still running causes the icon to disappear. 

I'm guessing that animation has some kind of meaning and isn't just animation for animations sake, but I don't know what KDE is doing while thats being displayed.

Video of me reproducing that: https://www.youtube.com/watch?v=i5xnH_qKOCw

Comment 5 Nate Graham 2025-09-17 14:34:51 UTC

Thanks, I can reproduce this 100% with Brave now. I suspect it's related to the fact that the cursor launch feedback animation doesn't stop when the app launches. It's supposed to.