When filling and emptying cauldrons, the water sound is always played regardless of whether the cauldron is being filled with lava or water

When filling or emptying a cauldron, the water sound is always played, regardless of whether the cauldron is being filled with lava or water

To reproduce:
1. Place cauldron
2. Fill cauldron with lava
3. See (or hear) bug

The cauldron was placed on top of an amethyst block in a plains biome.