As a note. I've noticed a big difference with a save file being above maybe 60 MB compared to a brand new game.
Replicated on Nintendo Switch. Version 1.9.
Version 1.9.0 on Nintendo Switch. Game crashes on loading or more frequently on making an change to video settings.
I always try to remember to put everything in a chest before logging out. Doesn't save the exp but I at least save my stuff.
I get slimes in Swamps on version 1.8.1 on the Nintendo Switch. I've yet to see one underground.
I can verify.