Clicking the close button in the upper right corner of the window may cause the window to freeze instead of closing normally. After the window is frozen, you need to move the mouse to close it.

what OS and what version on Tixati?
does this happen for any other programs you run?
does this happen if you try to close a popup window from Tixati?, or just the main window?
if you dont move the mouse will it eventually close?

Windows 11 Insider Preview 24H2 26200.5603
Tixati 3.35

no

both popup windows and main windows have a chance to happen

No, it will always be frozen

did it happen on previous versions of tixati?
did it start after upgrading tixati? upgrade from what version?

I have this problem in previous versions, but I can't remember which version it started in.