Please visit our bug report site to see if the problem has already been reported: msft.it/6017bJ4Lx. You can upvote if the issue hasn't been resolved. If you think you've found a new bug, visit our help site here on how to submit a report! msft.it/6018bJ4LI ^TK
Please visit our bug report site to see if the problem has already been reported: msft.it/6011bJ2oD. You can upvote if the issue hasn't been resolved. If you think you've found a new bug, visit our help site here on how to submit a report! msft.it/6012bJ2oE ^TK
What troubleshooting steps have you tried at this point and has your friend ever been able to join your Realm? I assume you're both using the Windows 10 Minecraft?^TK
We have a workaround to this issue, however, I will need you to submit a ticket to our support team for the steps as it's too much for a tweet. msft.it/6014bJLfk ^TK
Have you added any new features to your World that could be slowing it down? Also, have you by any chance tried any basic troubleshooting for connection issues? ^TK