had a few issues in Multiplayer to do with backpack / crafting
Resource harvesting when backpack is full (not host on multiplayer) the resource plops onto the ground and only the host can pick it up.
Sometimes when harvesting, you cannot collect a specific resource (not previously harvested) and you will collect but no resource is gathered (harvesting tool jammed?).
When crafting with a full backpack, say making filters, if your backpack is full, but WITH a compound being stored in the backpack, instead of being swapped with a replacement compound (to refill the mini Printer)