Lately it seems there’s constantly problems with connecting to some realms. Yesterday morning (13th July), two realms that I’m part of weren’t working and no one could connect to either of them, but all other realms I’m in, we’re working fine. The affected realms were fixed later in the afternoon. 
Today however, one of the realms that was affected yesterday Isn’t working again today. No one can connect and it gives the message “unable to connect to world”. All other realms I tried are working fine.

so some realms are fine but others keep having problems? This one particular realm seems to be in the firing line a lot