Mobs will not enter nether portals if there is no portal in the opposite dimension within range where they could exit. This is especially confusing because of the mechanics described in MCPE-39609. A player can make portal in the overworld, go through it, then on the nether side push a mob into the portal, and find that the mob will not go in.

Steps to reproduce

1. Create a new world.
2. Create a nether portal.
3. Spawn a mob and push it into the portal.
4. Kill the mob, then go in the portal yourself.
5. Once in the nether, travel 100 blocks away.
6. Create a nether portal.
7. Spawn a mob and push it into the portal.

Expected results

The mobs goes into the portal in steps (3) and (7).

Observed results

The mobs do not go into the portals.

I went to transport villagers through the nether I made the portal in the normal world they passed through the portal normally I took them to my base in the nether where is the portal that leads to my house getting there I put them in the portal and the portal made a sound that the villagers were being teleported but they remained in the nether they were not transported to the normal world and this happened to other creatures such as wolf cats and wizards