I tested a little further. First I tried the new version 1.19.3 and the latest forge version, the problem is still there. then i thought i would build it in my test world, i only built the potato side at first, and the farmer dropped it to the other villiger. then i built the other side with carrots, and now the carrot farmer doesn't drop anymore. it seems that with forge the collection villiger only gets dropped by one villiger