Sorry for the holdup. I've sorted out the "fade BGS" issue, but I don't see a repro with game end > main title crashing the game. I'll try a few more things, but it could be caused by another plugin and it's just reporting that I'm the cause.
EDIT: Oh, ha. My fix to "Fade BGS" must have also fixed that; I undid it and reproduced the crash first try. Welp, two birds with one stone before you've even properly looked at the second bird I guess? I'll have that out soon.