Realms failing to load Pocket Edition

Realms were working fine up until today. The realms and friends I have fail to load and even though I have been playing in a realm only 30 minutes before, it says I have 0 realms or friends online. Sometimes the grey box in which the realms show up in is blank but mostly it either tells me that realms cannot be loaded or there's a loading screen fetching the realms. A couple times the realms have loaded but when I try to get into them, an unknown error occurs.