Put the summary of the bug you're having here

What I expected to happen was...:
When i catch mob to portal frames it should teleport into overworld right? it does not.

What actually happened was...:
It just sits in portal and do nothing, and becouse of that i can't do advancements like  "Uneasy alliance" or "Feels like home"

Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...I don't understand question (sorry for my english im not good at it)
3. ...