I just built a guardian farm in the 20w20a-20w20b snapshot and it was working great. I then updated to 20w21a and guardians no longer spawn inside the farm. The farm I built it a tank of water inside a large area of drained ocean which used to house an ocean monument. prior to updating, I was getting over 20,000 drops per hour. Now I get zero.
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migrated
migrated
Same problem here, updated a world from 20w20b to 20w21a and my guardian farm is dead. Note that guardians don't spawn in any of the ocean monuments I have found in this world. This applies to both versions of the world I run (survival and creative).
Generating a new world with the same seed spawns guardians normally.
Loaded an even older world and it has the same issue, guardians don't spawn. This doesn't seem like an isolated problem.
migrated
Same issue here. There's 0 guardians spawning in my guardian farm, while it was working efficient in previous snapshot. Might have something to do with structures being renamed to lowercase. My creeper farm is working just fine for example.
galaxy_2alex
Forward-resolving to MC-184740, as that ticket deals with the issue in general for all structures.
I have the same Problem. Just cleared all elder Guardians in an Ocean Monument in the last Version and wanted to build a farm too. Zero spawns in the Monument anymore