[MC-192803] Mobs not spawning in selective areas

I created a hardcore world in a snapshot 20w16a, and I had built a large scale witch farm, slime farm, and guardian farm. (Listing the affected farms) I recently tried to afk in my guardian farm, and it would appear no guardians had started spawning. I went to my slime farm to try and get slime blocks, and no slimes would spawn. I have lit up every cave in a 500 block radius, and the mobcap is at 0. No mobs. I went to check on all my other farms, my natural regular mob farm (Zombies, Creepers, etc.) Would spawn mobs normally. My enderman farm would spawn mobs normally. My witch farm, did not spawn any witches. This looks to me that the mobs that are supposed to spawn in certain chunks or areas (Slime chunks, Witch Huts, Ocean Monuments) appear to not spawn, those mobs. I'm not sure what I can do at this point, I believe this is a different bug than the MC-148613 bug report. Please look at this asap, as it could be a large-scale bug. I am open to downloading any world revives.

Comments 3

Arisa Bot 2020-06-30T01:30:50Z

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[Mod] markderickson 2020-06-30T01:53:46Z

Hi there!

This isn't a duplicate of MC-148613, but it is a duplicate of MC-186096/MC-184740. This is a snapshot-related bug; it was caused due to changes made in between stable versions. There are some comments in that report that may help you fix your farms, but it isn't guaranteed.

In the future, please be more cautious about playing in snapshots.

Colter 2020-06-30T03:41:14Z

Hey, just as a follow up I was wondering if you know any ways to revert/change file names to lowercase. If you could, this would be greatly appreciated.