This bug has been fixed in the latest perf branch
2.22.154017 Fixed: Possible freeze when video player is shut down (the main menu tile videos)
since last update game taking ages to close, i closed the game at 22:01:55 and it ended at 22:22:19.
the log shows:
22:01:55 Shutdown normally
22:22:19 Memory should be free now.
22:22:19 1498398 B not deallocated
tested with proton 10-11 and GE
Launcher.log https://pastebin.com/BM5196Ku