Villager tries picking item without stop

Villager try to pick item without stop.

how to realize?

I do not know but I have some suggestions.

Suggestions with fixing bug

1:Maybe when the villager tries to pick item buy suddenly

player leaves the chunk that villager in so that villager can not

pickup item currently.

2:Maybe the hopper minecart tries to pick the item but rge villager 

wantd too so that they are fighting(I hit the villager, the hopper

does not pick, so this 2 suggestions is unviable.)

3:Might villager stand on the full block not the farmland

that villager can't picked item currently.

It also happened on BDS server  ,singleplayer world.

You can see the video below the text.