Hello!
I've been having hangs using potplayer, when I quickly open files after each other, fast enought so the playback doesn't have time to start.
At last I thoroughly tested it and it apparently it depends on using madVR as a renderer. I reported it to the potplayer dev (with
Potplayer and madVR configuration) and he claims it's a madVR bug.
I of course can't tell whether he's right or not, but I thought I'd mention it here.