I'm running a modpack on a private server (https://www.curseforge.com/minecraft/modpacks/medieval-minecraft-modpack), that has Create v0.3.2d on it. In a single player creative test world, my rotary kelp farm works just fine - harvesters break the top layer of kelp, pick it up, store it in an attached chest, and the portable storage interface dumps it once per rotation.

However, on the multiplayer server, the Harvester blocks do not pick up the kelp items when they are dropped.

Am I missing a really obvious MP config issue, or is it likely caused by another mod in the pack?

Is this a Mohist server? If so, use barrels instead of chests

Also see: MohistMC/Mohist#1180

Barrels work - odd. Thank you.