Just messing fluid pipe and valve with some liquid tanks
Log: https://gist.github.com/wormzjl/48bddc6d8a3d26205f4f8361f515a058

Can you send me a screenshot so I can reproduce here?

This does not seem to happen with a fixed setup, but randomly on block update.
I'm using magneticraft tank for testing, and I'm using openj9

Ok thanks i will do some tests here

By the way I haven't figured out how to make pipes and valves work, can you give some hint about this?

The valve can pull fluid from tanks and passes it only if it is open, pipes cannot pull fluid only send

Ok thanks! I thought that the value can be put in-line by the look of it.