SMP - SinglePlayer world open to LAN, crafts from second player are received by main player

[frenchiveruti]

So, playing with another person on a world made via "Open to LAN" feature of MC 1.12.2.
Using PrimCraft 1.4.1. Modpack Life in the Village.
Method:
Open world to LAN.
Make player 2 join
Try to craft any item using Primitive Craft.
Player 2 gets no item
player 1 magically receives item.

Player one has enabled "recipes with multiple ingredients" in case that makes any difference.

[Tschipp]

That is very strange. Will investigate.

[frenchiveruti]

As something extra, we followed this steps to disable PvP:
https://www.howtogeek.com/258805/how-to-disable-player-vs.-player-pvp-damage-in-minecraft/