multiplayer issue

This is my second report about multiplayer“can't connect to the world” problem. Last time i have talked about update1.16.200 and 1.16.201 have some problems with servers/multiplayer world. And first i though it was my connection problem but nope my connection is in perfect condition so i download older version of Minecraft (1.16.100) and bam! Now i can play with my friends (he also download 1.16.100) so its very clearly that new update (1.16.200 and 1.16.201) have bugs in multiplayer system. Pls fix this.