The water does not run when a cave is generated on a lake.

What I expected to happen was...:
The water should go into the cave.

What actually happened was...:
The water stands still. Probably because the block was not updated.

Steps to Reproduce:
Coordinates:
X:"119".
Y:"62".
Z:"191".
Map Seed:"AAASUFRYY".

Extra information: In the World Personalized removed, it happened with the water and lava.