When one of its buffers is filled, using me fluid formation plane will not consume fluid

reproduce the bug
https://streamable.com/5n2vh5

Minecraft 1.12.2
forge 14.23.5.2855
appliedenergistics2-rv6-stable-7

Sorry, the fluid interface is bugged in 1.12, but we don't support versions older than 1.16 anymore.