Realm server leak and jerky, especially in the Nether, it constantly stalls even when things are broken down. We also keep flying from the server or the server cannot be found. You are suddenly teleported because it is leaking. When dismantling it jerks and the sound comes late. You get kicked by the server. Xbox cannot find server or failed to join server.

Crashes such as these are logged automatically, this will therefore be investigated further by the development team internally.

NO!!  
that can't be, otherwise it wouldn't have been like this for almost a year. And according to Mojang support it should be posted here.
Previously reported as REALMS-6813