My gold farm is broken due to this bug. Furthermore, when I killed Zombified Piglins, they do not drop any experience.
The bug has still not been fixed. My witch farm still has regular mobs spawning inside.
My witch farm no longer works either. It becomes a general mob farm since mobs such as zombies, skeletons and creepers spawn inside witch hut.
I have a librarian with the same problem after being cured for three times. The other three cured librarians work as normal.
I play this world in every snapshots in 1.16 but not in previous versions. The issue still persists after optimizing the world. The shade happens everywhere(desert, plains, savanna, mountains, ocean, etc.) without torches lighting up.
20w18a still has such issue.
They were naturally spawned in.