when the cave dweller is chasing, climbing can cause it to get stuck and not crawl/crouch, instead just standing at the end of the lower roof, sometimes it works as normal though.

Fixed an issue with a certain situation just now
Which version are you on? nvm just saw you're on 1.20

Can you try this version?

https://github.com/SiverDX/cave_dweller/releases/tag/test_build-1.20.1-1.6.3

seems to work well for the most part, but the dwellers can't go through a 1x1 hole if it's in the middle of a 3x3

after further testing, they can get out if they climb the right way, because then it's below them and those work fine

https://github.com/SiverDX/cave_dweller/releases/tag/test_build-1.20.1-1.6.4 should have a fix for that
also it no longer avoids rails for pathfinding

Latest CurseForge release (1.6.4) fixes some issues with pathfinding and crawl/crouch