I have not been able to recreate this issue, but a few of my players have reported it. My menus were all made with a 1920x1080 stage. When playing the game in full-screen mode, players with a 4k monitor cannot move the mouse outside the top left 1/4 of the screen. Have any of you had that happen? How did you fix it?
I am having trouble reproducing this issue. I have made test menus with various stage sizes, switched from windowed to full-screen, changed resolution, and I am unable to reproduce the issue.
Any ideas for what I should try?