Dan Parr

I'm having similar issues. I built an underground village and when I expanded it to a second level, the villagers started having major issues pathfinding. They ignore the staircases leading down and instead stand on a block directly above their bed (which is 5 blocks down on the floor below) and after a few seconds show the angry particles and release the bed

Same here. I found the entire raid in a sealed cave below the village. In the end I followed the iron golem to where it was standing staring down at the floor and dug straight down (I'm a rebel!) to find them.