Issue Awkward NPC Pathing

[Eddy Squill]

Currently playing with SDV Expanded, Ridgeside Village, and Downtown Zuzu being the most recent big one I downloaded. Everything appears to be working okay aside from the pathing of NPCs; most have been going through walls or the void itself while June in particular from RSV, whose supposed to sit and play the piano at the hotel, has been sitting floating in mid air where the hotel rooms are located the floor up the stairs(example shown in photo). I'm not sure how to fix this, as SMAPI doesn't appear to be telling me anything in particular could be the cause. Would greatly appreciate any tips or advice that could be given please.

Here is a copy of my most recent log: https://smapi.io/log/7bb8f6892b884ad7bcc750f1f99293f9