KeePassXC freezes KDE Plasma panel on exit

[riomccloud]

I'm using Arch Linux with KDE Plasma 5.26.5. When I close KeePassXC 2.7.4 - Flatpak version - (with it configured to be immediately closed, without going to the tray), my bottom panel freezes for ~2-3 seconds. First time I thought it was a KDE bug, but I noticed it always & only happens with KeePassXC. IDK if it happens with other DEs, distros or package types.

Edit: It does not freeze the panel when exiting the application via the Database > Exit menu.

Steps to Reproduce

1. Open KeePassXC Flatpak in Arch Linux
2. Close it
3. That's it

Expected Behavior

Just not freeze.

Actual Behavior

It freezes for ~2-3 seconds.

KeePassXC - 2.7.4
Revision: 63b2394

Operating System: Arch Linux
Desktop Env: KDE
Windowing System: X11

[michaelk83]

May not be unique to KeePassXC, and may be related to how the clipboard is cleared:
https://bugs.kde.org/show_bug.cgi?id=432810
#6101 (comment)
#6101 (comment)

[ghost]

Have the same issue on Devuan Unstable (KeePassXC 2.7.4)