Filled lava and powder snow cauldrons are still able to be put under water

The fixes for MC-203748 and MC-240948 are incomplete. Filled lava and powder snow cauldrons are still able to be put under water.

Steps to reproduce:

1. Place a cauldron and lava/powder snow inside it
2. Place water above the cauldron

or

1. Place a cauldron and completely surround it with water
2. Quickly retrieve the water block above the cauldron and put lava/powder snow inside the cauldron