[Bug]: Emptying large chests incorrectly on hoppers

[Mart-y-McFly]

Version of BlockProt

Paper 1.21.1 build #122, BlockProt 1.2.2

Description of the bug

If a large chest is emptied into two hoppers, only the side that was used to unlock the chest is emptied into the hopper under the chest.

Steps to reproduce

1. build a large chest.
2. place two single chests one row below and one row in front.
3. now place the two hoppers under the large chest that lead into the two individual chests.
4. unlock all the hoppers and chests.
5. place any stack of items in the large chest and see what happens.

Additional context

In my case, only the chest that is under the side of the large chest that was clicked to unlock is filled.

[Mart-y-McFly]

The problem also seems to depend on the direction of construction.

[Mart-y-McFly]

After installing some updates on the server (paper, Geyser, Java, etc.) the problem seems to be solved.

I can't find in the Minecraft documentation whether there is a sequence that regulates which hopper something is passed on to if you only put a single item in a large chest. Maybe that was the problem too, I'll keep watching and tinkering for now.