There is a green thing on the head of the villagers, and the villager zombies are weird.

If it is true, the head of the villager is supposed to be the same as before but it has turned green. And the villager zombie's hand disappears and a mysterious object appears on the head.

 

This bug occurred when updating to 1.14.4.

When I opened the world, most of the villagers' heads were green.

And villager zombies had strange things around their heads. And now my arms are gone.