[BUG] Closing the main window doesn't actually close it

[MBR-0001]

Describe the bug
I close the window and it disappears (actually gets minimized), but if I alt tab it is still present in the app list, if I focus it it will appear again but only with the blurred background. (check video)

To Reproduce
Steps to reproduce the behavior:

1. Start the app
2. Click X
3. Alt tab back to the app

Expected behavior
Window shouldn't be in the tab list

Screenshots
Check first comment

Desktop (please complete the following information):

• Operating System: openSUSE Tumbleweed 20250307
  KDE Plasma Version: 6.3.2
  KDE Frameworks Version: 6.11.0
  Qt Version: 6.8.2
  Kernel Version: 6.13.5-1-default (64-bit)
  Graphics Platform: Wayland

• Application version: 5.1.0.2 (latest flatpak)

Additional context
Happens only at startup, until the window is shown again (through the tray icon) and then closed.

Log files
MainWindow.OnClosing: Termination cancelled appears every time X is clicked, even when in bugged state

2025-03-13 17:32:38.986 +01:00 [INF] Window startup time: "00:00:01.5773998"
2025-03-13 17:32:39.015 +01:00 [WRN] IDeviceSpec: Cannot compare revision for "NoiseControlModeDualSide". No ExtendedStatusUpdate cached
2025-03-13 17:32:39.016 +01:00 [WRN] IDeviceSpec: Cannot compare revision for "NoiseControlModeDualSide". No ExtendedStatusUpdate cached
2025-03-13 17:32:39.257 +01:00 [WRN] IDeviceSpec: Cannot compare revision for "AdvancedTouchLock". No ExtendedStatusUpdate cached
2025-03-13 17:32:39.257 +01:00 [WRN] IDeviceSpec: Cannot compare revision for "AdvancedTouchLockForCalls". No ExtendedStatusUpdate cached
2025-03-13 17:32:39.257 +01:00 [WRN] IDeviceSpec: Cannot compare revision for "NoiseControlModeDualSide". No ExtendedStatusUpdate cached
2025-03-13 17:32:39.258 +01:00 [WRN] IDeviceSpec: Cannot compare revision for "NoiseControlModeDualSide". No ExtendedStatusUpdate cached
2025-03-13 17:32:39.258 +01:00 [WRN] IDeviceSpec: Cannot compare revision for "NoiseControlModeDualSide". No ExtendedStatusUpdate cached
2025-03-13 17:32:44.234 +01:00 [DBG] MainWindow.OnClosing: Termination cancelled
2025-03-13 17:32:47.366 +01:00 [DBG] MainWindow.OnClosing: Termination cancelled
2025-03-13 17:32:58.999 +01:00 [DBG] MainWindow.OnClosing: Termination cancelled

[MBR-0001]

2025-03-13_17-21-56.mp4