Try "Clear Icon Cache" from here: https://github.com/thepwrtank18/small-utilities/releases/tag/pack5
Can you give a crash log of Minecraft?
You can find it in "%appdata%\.minecraft\logs".
We can't really help you if you don't give actual context.
This isn't a fault on your end, the servers are being finicky right now.
Can you put in your crash log?
To find it, go to "%appdata%\.minecraft\logs".
It's been 8 years. 8 YEARS, and finally fixed.
Answer for people who are in this issue: Don't run the game from Steam, and disable any overlays (Discord, Overwolf, etc.)
how did you fix it for other people that have this issue