Unexpectedly closing windows and pop-up under KDE Plasma Wayland

[Stormax181iq]

Description

When running ClipCascade client on Fedora 43 with KDE Plasma on Wayland, all application windows experience significant lag. Specifically, "pop-up" menus such as the burger menu in Brave browser close automatically about 1 second after opening. This behavior affects both system and non-system applications. Quitting ClipCascade immediately resolves the lag and menu issues.

Steps to reproduce

1. Install and run Clipcascade client on Fedora 43 Kde Plasma Wayland (might be for any wayland session, need check)
2. Login to your instance.
3. Open an application with pop-up menu like Brave Browser
4. Observe that the menu closes prematurely after 1 second.
5. Quit ClipCascade
6. Observe that the bug stops

Expected behaviour

Pop-up menus should remain open and responsive without lag when ClipCascade is running.

Actual behaviour

Pop-up menus close automatically after a short delay.

Example screen recordings

I’m not voluntarily closing the menus in these recordings.

Screencast_20251116_094229.webm

Screencast_20251116_094317.webm

Screencast_20251116_094339.webm

Environment

Operating System: Fedora Linux 43
KDE Plasma Version: 6.5.2
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
Kernel Version: 6.17.7-300.fc43.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 4 × Intel® Celeron® N4120 CPU @ 1.10GHz
Memory: 4 GiB of RAM (3.6 GiB usable)
Graphics Processor: Intel® UHD Graphics 600
Manufacturer: HP
Product Name: HP ProBook x360 11 G5 EE
System Version: SBKPF

Logs

user@fedora:~/ClipCascade$ cat clipcascade_log.log 
2025-11-16 09:40:39,706 - INFO - Websocket connected
2025-11-16 09:40:39,784 - WARNING - Unsupported display server detected $<class '__gi__.gdkwaylanddisplay'>. Starting polling mode for XWayland server as fallback.
2025-11-16 09:40:39,794 - WARNING - x-clip is not owned by the current user. Switching to wl-clipboard.
2025-11-16 09:45:28,002 - INFO - Websocket disconnected
2025-11-16 09:45:28,617 - INFO - Clipboard monitor stopped
2025-11-16 09:45:29,001 - INFO - Websocket disconnected

Additional information

The issue doesn’t appear in an X11 session.

user@fedora~: echo $XDG_SESSION_TYPE
wayland

[toniR15]

I have the exact same issue, just in Fedora KDE.

Another thing that I have noticed is that if I keep a key in the keyboard pressed, it doesn't maintain the press, it cuts down in less than 1 second. So to delete a long sentence or to write a bunch of the same letter, I have to press one by one

[MadhurBarnwal]

Same with Arch Linux here. KDE Plasma

[MadhurBarnwal]

Will it ever be fixed? It's a very useful application. It is causing my a lot of headache in its absence

[MadhurBarnwal]

Come on! Someone. Fix it!