Villager duplicating potatoes. Like, several thousand potatoes in a minute.

So... This was insane.
I'm not even sure what to search for to see if this is a duplicate, so I'm just gonna leave this right here.
I was moving my villager breeder, and so I put the dudes in boats on top of some potatoes. I moved one villager, success. But this guy... Oh, this guy. I began to move him and he started spewing potatoes EVERYWHERE. Within a few seconds, he had created so many potatoes that standing right inside them kicked me from the server. I was able to break some blocks below him to stop him from making more. I then moved him and burned the dupage. If you don't believe it, watch this: https://youtu.be/Ic7qUiud23o