App closes when you override a keybind
Go to Edit > Preferences > Shortcuts
Choose any shortcut and click "Define"
Enter a keyboard combination that is already mapped to a shortcut (e.g. Ctrl+C)
Click OK after the popup
Musescore 4 closes and the shortcut isn't changed. Any other shortcuts you made before exiting preferences are undone. It can still restore the previous session, but it's very annoying regardless