When logging into a realm with a specific user, the client issues the message, "Disconnected from server" for all users logged into the realm. For the next few minutes the realm is unavailable with the client message, "Could not connect to the world"

After a few minutes, most users can log into the realm again, but when the original user logs in, the problem is repeated. The original user cannot enter the realm. Purportedly changing the user's gamertag resolves the issue temporarily, but I could not reproduce this.

This problem was observed on both Windows 10 Edition and Pocket Edition (Android)

Forum links of people with the issue:

http://www.minecraftforum.net/forums/support/minecraft-pocket-edition-support/2701145-realm-sever-crash-glich

http://www.minecraftforum.net/forums/support/minecraft-pocket-edition-support/2696779-cant-connect-to-someones-realm-yes-i-reuploaded