FancyFluidStorage Version:
2.0.3

MinecraftForge Version:
12.18.3.2254

Client or Server?:

• Client

What happens / happened?:
I play a single. I leave the game - I go back - the amount of liquid in the tank increases in two.
Checked with different liquids - all the same.

Ok so if there is more than one valve this happens

fixed in 1.12