I have to create new ticket on same issue, back then i was playing with minecraft with optifine. Now, same bug but in vanilla environment.

My problem is that I can connect to my own realm, then after 5 seconds - 2 minutes, the game kicks me off the server with this error message : "Internal exception: java.net.SocketException: connection reset. I've done all the things recommended in the youtube videos and on minecraft site, but it didn't solve my problem. I can also play big servers like Hypixel with not problems. It's literally just my own realm, my friends can play there with no problem, its only me. I am not using any fancy mods, just optifine. I have tried with firewall on and off. Literally nothing helped.
Please help me with this issue, ive paid for a realm that i cant even play on . 
 __