Hi all,
I’m going to update to a patch from dfcaverns/subterrane that fixes this. You can read more about it here:
https://github.com/FaceDeer/dfcaverns/issues/39#issuecomment-1287836404
It was fixed 22 days ago when someone else reported the bug. I meant to merge it in the next stable update, but didn’t get around to it quickly. Since it is causing bugs now, I want to rush it in ASAP. I’m merging the fix into MeseCraft right now. It should be live soon.