If MP is minimised to the system tray (windowed mode at least) when a context menu is open, it cannot then be restored.
It happen open for fullscreen/windowed.

h4. Steps to Reproduce
Start MP in windowed mode
go to my video
go to an folder or video file
press f9 to open the context menu
send MP to tray
try to restore (will not succeed because of the context menu block it)

Start MP in windowed mode
go to my video
go to an folder or video file
press f9 to open the context menu
do alt+enter to go in fullscreen
MP is freezed