Hi, I have multiple pumps in the Nether pumping lava into an ender tank. I've noticed it seemingly randomly just stops pumping lava and the ender tank at my home base empties. If I go back to the pumps in the Nether, they magically start working and the lava fills right up. I have all the chunks in the Nether chunk loaded (both using FTB chunks and a chunk loader from Kibe mod), neither works.

See screenshot of the nether setup.

I've noticed this issue as well, with the same circumstances.

After a bit more observation, I think it happens because the pump can't pump blocks in unloaded chunks but tries anyways. The default pump range is 64 blocks (~4 chunks, cylinder), but that chunk loader only has a range of ~40 blocks (2.5 chunks). I think a workaround is to put down 4 more chunk loaders, so that they're in this pattern (1 square is one chunk):

[diagram removed]

This way, they cover the full range of the pump.

EDIT: No, this didn't fix the issue. The chunks are loaded but the pump stops pumping until a player enters range. Other devices continue to work.