Any Xojo gurus got an idea how I might track this one down?
Here’s what a normal window looks like
And here’s what it looks like after the screensaver deactivates:
The app still works but the window is mostly frozen. Some containers will show on demand but the window itself won’t update even if resized, maximised, hidden, etc. Sometimes during extreme resizing a bit of the missing UI can be dragged on screen as if it located off left of the screen. However controls that are still visible are unresponsive.
Menus work and modal dialogs, preferences screens, etc display fine.
This happens infrequently enough to make debugging almost impossible but often enough that customers complain.
It’s a complicated app with timers and self updating views but this affects every element, even static elements.
As far as I can tell, this problem started in Xojo 2025 r2.
Problem doesn’t exist on Mac version of app.

