@Werner_Cichy I believe the fix was to do with how items (e.g. the trophy) were pinned incorrectly on the game board in full screen mode.
It might not be possible any longer to resize the game board freely by dragging the mouse. But I'll double check that and get you back after the weekend.
That is very strange! You might want to try uninstalling and reinstalling the game app from the Microsoft store. You shouldn't lose anything. I didn't when I had to do that to my computer.