Repeatedly being logged out of Realms

Put the summary of the bug you're having here

What I expected to happen was...:
I have been playing on a Realm with a few other people, and I expected to at least be able to stay in the game. I know Realms are still in the testing stages but the bugs make it nearly impossible to play

What actually happened was...:
Every few minutes someone in the Realm logs out because the game crashes. You have to log in again to get back onto the server.

Steps to Reproduce:
1. Play on Realms
2. Wait a few minutes. Excessively chatting seems to make the lag worse
3. ...