ToME: the Tales of Maj'Eyal

I left halfway through dreadfell and came back after taking an item out of my vault, came back and the dungeon had re generated. Don't know if it's a bug but I've never had a dungeon come back.

Do you use steam and have cloud saves enabled? I've been trying to track certain oddities for awhile and in almost every case cloud saves were on. I have become suspicious.