Realms disconnects frequently after joining

This issue seems to be new to 1.16.3 realms for java and has been disconnecting users shortly after joining. Users can get up to a few minutes of glitchy game play before the server is disconnected.

If this doesn't happen then often they will be stuck falling into the abyss &/or having time rewind itself in the server causing them to rubber band by up to 5 minutes.  

It can take up to 2 hours to travel 100 blocks Due to this bug.

Currently getting >70Mb/s <1.4ms jitter, 0 packet loss, <12ms ping on a wired connection.