Game only crashes in singleplayer

so i don't know if anyone else has had this issue, BUT i've recently discovered after a few days of co-op only that my game just... doesn't crash /at all/ in multiplayer.

i wanted to get back into playing solo, so i made a new save and got about as far as the crypt, where my game started crashing every five minutes or so?

my friend recommended that i turn on direct connection and enable multiplayer and see if that helps, and that... sort of prolonged it? just a little bit? still crashes, though.

i don't have anything open when playing BG3 except discord, and even then- i had discord open during my co-op game too.