Game crashes & erases entities when going through a portal with tamed mobs

Partner Rank:

2

Partner Team Reporting:

Jigarbov Productions

Verification builds and Platforms:

1.17.32.02

Summary:

Game crashes when going through a portal with tamed mobs

Impact:

This will impact the release schedule of an upcoming project and has no work arounds.

Repro Steps:

1. Create a new world
2. summon some wolves
3. tame them with bones
4. make a nether portal
5. go through the portal to the nether
6. go back to the overworld
7. repeat until crash/mobs dissappear and dont follow.

Observed Results:

the wolves will not follow you and the game will crash about 2/3 of the time. This will also cause the wolves to dissappear when relogging into the world.

Sometimes we also get this assert

Expected Results:

your tamed mobs should not cause game crashes and should follow you through to the other dimensions.

image above attached

Regression Builds:

found a report from 2 years ago on reddit where they experienced the same thing, so i guess its a long time bug I tested on 1.16.220 and it crashed on the way to the nether.

Notes: