SUMMARY
I've experienced errors importing transactions into Skrooge (because I lost my import CSV fields definition, my fault). When I try File > Import > Import... a second time, the skrooge flatpak under Wayland has crashed three times.

STEPS TO REPRODUCE
1. Run skrooge
2. File > Import > Import... and choose a bad .csv file
3. Dismiss the error message, and/or maximize Skrooge's messages panel, and/or ??? The exact steps aren't clear.
4. Retry File > Import > Import...

OBSERVED RESULT
The file dialog may appear, but the Skrooge window goes unresponsive and crashes. One time the menus and submenus remained on-screen briefly after the skrooge window went away.
Nearly every time in the terminal where I ran the flatpak I see
        ##WARNING: setGrabPopup called with a parent, QtWaylandClient::QWaylandXdgSurface(0x563fbe55d100) which does not match the current topmost grabbing popup, QtWaylandClient::QWaylandXdgSurface(0x563fc33e9120) According to the xdg-shell protocol, this is not allowed. The wayland QPA plugin is currently handling it by setting the parent to the topmost grabbing popup. Note, however, that this may cause positioning errors and popups closing unxpectedly because xdg-shell mandate that child popups close before parents

However, I see this warning even when there's no crash.

EXPECTED RESULT
No crashes

SOFTWARE/OS VERSIONS

Linux/KDE Plasma:
KDE Plasma Version: 5.26.3
KDE Frameworks Version: 5.99.0
Qt Version: 5.15.6, wayland

ADDITIONAL INFORMATION

I'm running the skrooge//master flatpak from kdeapps
      Commit: 08c9cf54185ecf222dd23dd2519322b368bcefd1da97f6fbf15ea86253046ce0
      Parent: e3434ea5c2e3dc00566ed2b90ee2e7c3d8d1f1588a208f671388194b48b34f15
     Subject: Built on Wed Nov 16 13:32:18 CET 2022
        Date: 2022-11-16 12:36:11 +0000
using
      Runtime: org.kde.Platform/x86_64/5.15-21.08
there are updates to both the app and runtime flatpaks, but I'm afraid updating may trigger bug 408970.