Blocking players doesn't work

I blocked many players, but they are automatically unblocked.

All actions in Lichess have some limit (although I don't know those limits). You can't block literally everyone.

You can’t block more than 300players.

Thanks. I see on the list it's to 500. Also when I block someone, it doesn't work immidiately.

Blocked players can join to the simul (tournament games too).