Crash while playing on Minecraft Realms.

Put the summary of the bug you're having here

What I expected to happen was...:
That realms wouldn't crash.

What actually happened was...:
The game crashed.

Steps to Reproduce:
1. Played like normal, driving a minecart and walked out of it. After about 10 Seconds of lagg, the game suddenly crashed.
2. I don't if this is a problem with Minecraft Realms or the game at all.