Crash when returning from Nether

I am the Realm Owner, every time I return from the Nether, after taking maybe 30 - 40 steps from the Nether Portal in the overworld, I get disconnected from the Realm. This has happened to other players in my Realm too but not every time. For me, it is EVERY TIME. I have been forced to send friends to the Nether to gather supplies for me. Please help!