System and IINA version:

• macOS 11.0.1
• IINA 1.1.1 Build 125

Expected behavior:
When 'Use legacy fullscreen' is on, should enter into fullscreen after double click

Actual behavior:

1. Double click > goes to fullscreen
2. Double click > goes windowd
3. Double click > Nothing happens
   (sometimes crashes after finishing playback)

How often does this happen?
Every time