Leatherworker villager uses cauldron with lava as a workstation.
Happens in java edition on latest 1.19.2. I assume other versions are affected too.
This is a silly bug, that doesn't affect the gameplay, only immersiveness.
Probably a breaking change.
Related, but a different bug https://bugs.mojang.com/browse/MC-227469
I personally don't think lava, empty or snow cauldrons should be leatherworker's workstation, but that's up to mojang to decide.
Thank you for your report!
However, this issue is Working as Intended.
The report you have submitted is working as intended: as per the fix of MC-204430.
Please note, that mechanics of the game may change between updates.
Things such as graphics, sounds, world creation, biomes, redstone, villagers, and animals may not work the same in current versions.
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