[Bug]: Closing flatpak apps crashes KDE

[rtoscanelli]

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• You have searched pull requests and issues and have found none similar to your issue
• This problem comes from a failure in the tiling system and not a missing feature

Describe the bug

When closing flatpak apps (tested with Spotify, Zoom, Stremio) KDE crashes.

To reproduce

Open a flatpak app, then close it.

Expected behavior

Close app without crashing KDE.
If you switch the engine before you close a flatpak app the app won't crash KDE.

Log output

Can't get a log.

Screenshots and videos

No response

Additional context

No response