[1.20.x] [All] Bug: Inconsistent run in dev environment

[emyfops]

What happened?

My spider-sense tells me that this commit 93c942a introduce a deadlock, branches that are not up-to-date are to affected by this issue. It was actually the reflections library schizoing, I still don't know why
It causes frequent and un-reproducible hangs in the render thread

I have attached the threads dump in the log output

What should have happened?

The game should load with no issues

Version

1.0.0

Log Output

https://mclo.gs/zoAT5yI

[emyfops]

I have no idea what's really causing the issue so I need confirmation from others

[emyfops]

After debugging the error for 3 hours non-stop, not only I didn't find anything, but Beanbag told me that he had this issue for weeks and he didn't told me.
So we have to check the last 100 commits to maybe find the issue
Maybe it's related to the render thread, maybe it's a deadlock or maybe it's a reflections issue