pretty much exactly as the title says, i dont know if its something purposefully not included in the mod. im just trying to make a more compact simple bonemeal machine in my farming area, but the hopper upgrade will not push or pull either items to be composted or bonemeal from the composter.

is the storage that's pushing into the composter above it and the one that is pulling from it below?

yep, thats correct! ive also tried with the advanced hopped and messing around with the settings a bit, including having one pull and push, with no results.

This is fixed in the latest version just released on curseforge