Chat does not work after account migration.

I tried the troubleshooting step in previous "resolved" cases but they do not work.
1. I checked microsoft account parental settings and the chat is allowed there (screenshot below)

2. I cheked that the client settings that the chat is 'shown' (screenshot below)

3. I removed appdata\roaming\.minecraft folder and started launcher. So reinstalling the game.

4. I checked the server settings and chat is not disabled. I'm the admin and playing with op permission.

5. I also contacted the server hosting service staff and they asked me to check steps 1 and 2. They also said that this is a known issue and Mojang will fix it shortly... Nothing can be done on their end.

None of these worked.

It seems that these bug reports are just marked as duplicates of MC-209432 and resolved. But the problem is still ongoing.