Put the summary of the bug you're having here
What I expected to happen was...:
When placing water inside mangrove propagule,placing lava above should mix with water into stone.
What actually happened was...:
lava does not mix from above with the water and simply touches it.
Steps to Reproduce:
1. plant mangrove propagule
2. place water on mangrove propagule
3. place lava above mangrove propagule
Environment
macOS Monterey
Duplicate of MC-234622.