I have a big problem with pipes on my server. Cobblestone dupe in pipes connected to crucible from exnihilocreatio. And this happens when the chunk is not loaded.

Forge: 2705
Mekanism: Mekanism-1.12.2-9.4.13.349.jar
Other relevant version: exnihilocreatio-1.12-0.2.2.jar

Gonna call this an interaction issue, and with the latest changes it's likely fixed. Will re-open if this proves to remain a problem.