Villager Disapearing in Nether Portal

Some villagers after been teleported to the Nether via a Nether Portal are disappearing.

It occasionally occurred on version 1.16.0.53 but now most of the time this happens.

It happens on both side, Overworld to Nether and Nether to Overworld.

I tested both in my survival world and in my creative world and the results are the same.