So... posting this because someone else might have experienced similar, or whatever: Better Loading will, sometimes, fail to detect the "end of loading" event for a game, so it stays there on the final phase while the game is live underneath.

There are absolutely no errors in the logs or anything, and no identifiable cause of the problem, for me. I have not yet been able to track down the combination of circumstances.

When this happens I can't "save and exit to <anywhere>" from the menu (which ESC, or clicking the place that UI Not Included puts the button). Again, no errors in the logs, just doesn't work.

If you have experienced anything similar, can you share any suspicions with me?
Did you fix it? How? Mod conflict?

Either way, I can't tell how to make this happen for anyone else, so I'll keep working on that before expecting anything from the author. Because this isn't a fixable bug report, yet. :)