Mobs falling through end portals cause game crash

As of 1.18 Pre-release 4, the issue seems to be fixed

The bug:

A mob falling through the end portal causes a game crash. The world has a chance to crash again, this is not always the case and the world might be playable after reload.

How to reproduce:

1. Find or make an active end portal
2. Drop a mob or minecart through the end portal