When water is poured on any active lava, the water does not spread. Meaning it just stays there as if it were a solid block.

Put the summary of the bug you're having here

What I expected to happen was stone/cobblestone to be created:
Describe what you thought should happen here

What actually happened was the water stayed there, as if it were a solid:
Describe what happened here

Steps to Reproduce:
1. Place lava and let the lava spread over different levels of blocks
2. Place water above where the lava just spread another level
Note: Make sure the water is more than just one level over the lava
Note: Make sure the water forms a 1 by 1 pillar