Mobs that used to not spawn in a witch hut now do. The witch farm that I have used since 1.15 now spawns mobs other than witches in this current snapshot. Witches still spawn, but very rarely. I do not know if this is due to passive witch spawning or if it is from the witch hut. The screenshots show that there is a witch hut in a new world at the same position. The other screenshots are of the issue.