So I have a small compound made up of villager houses joined together in an experimental world. I went deepslate mining for about an hour and when I came back they have just vanished. no villagers around the base so no escape attempts. they've just up and left. please note that I did make a copy of the experimental world just before villagers decided to de-materialise, that may have something to do with it. tried reloading as well, no filler sounds either. I've also been having trouble with iron golems, where they will spawn in and imedeantly try and kill me. there is a small chance a zombie some how got in and killed everyone, but everything is lit up. I recently updated to 1.17.32, If there's any way to get them back I would appreciate it but I think they're past the gone. 

EDIT: loaded up the copy world out of curiosity, it seems that only half the villagers are in my base in this world. not sure what to do now.