Swamp huts not spawning witches

I was not able to replicate this. Are you sure your difficulty wasn't set to peaceful?

Difficulty was NOT set to Peaceful. Other hostile mobs spawned nearby.

I have seen this in two worlds: (1) a copy of an old world with a witch farm, (2) a new world created specifically for testing this. I have not seen a single witch spawning in swamp huts in either world except for the single witch that spawns with the structure.

I tried to upload a 22Mb world save of world 2 but couldn't do it due to the low limits on file size.

You can upload your world onto Google Drive, for example, and then share the link here. Make sure you set sharing permissions to "Everyone with this link".

Can't reproduce:

As Viradex requested, please attach a copy of your world using a third-party website (if necessary).

The FIRST witch spawns in the swamp hut. This is clearly stated in the description. The spawning of this witch is not affected. One witch spawns with the structure, other witches spawn within the bounding box. Bounding box witches seem to be absent. I am restating this for clarity.

I have spent half an hour in the vicinity of swamp huts in two worlds. Half an hour in a old world with a witch farm: no witch drops on hard difficulty (the same farm would have produced over a stack of redstone dust in that time). Half an hour in a freshly-created world on normal difficulty, no witches. I created a very simple witch trap in this world. No drops. I can rule out the possibility that witches don't produce drops (witches from spawn eggs produced drops).

I have copied a save file here: https://www.dropbox.com/scl/fi/rv3pvm0ajto8ar62wuhu1/MC-276836.zip?rlkey=7sb0rztcaqwfyxvf4nh4axdxr

Cannot reproduce. The swamp hut still spawns witches.

I attempted to reproduce this issue by standing at y188 and teleporting to the nearest witch now and then.