No Portal Cool Down on Mobs in Interdimensional Portals

[LazyKB]

I'd be surprised if you cant reproduce this. Basically in vanilla nether portal mechanics when an entity is sent through a portal it is given a 15 second portal cool down where it cannot go back through. This appears to not be the case with interdimensional portals, since these mobs are flickering, I believe it means that they are going back and forth between the overworld and the custom dimension repeatedly every tick. This probably isnt great for lag and is surely unintended.

2022-04-17.20-55-17.mp4