Yes, always check latest Minecraft news on the Minecraft channel, the website changelogs, or the Fandom wiki.
I am kind of having this same issue wherein 1.16.100 every world or server I join I have some sort of 10 fps and I can barely play. I don't know if it's my laptop that is causing the lag or the game itself.
Platform: Windows 10
EDIT: I think I am the only person having this problem and it is only happening on 1 device.
The same kind of thing is happening to me, except I just realized something. If you aren't signed in to your Microsoft account, the game won't crash. If you are, it will crash. I noticed this because I saw corrupted data which possibly answers my/the crashes. So I guess you can only play without a Microsoft account until this is fixed.
Affects 1.17.10 too.