my city was in P2:R13, and i started exploring other realms, then suddenly when i hovered over the button to go from P2 R18 to P2 R19 the button said return to your home realm? I just clicked it and my city was now located in P2 R19, at the same X and Y coords as i had in Realm 13. I did not try to move my city and I did not have a Cooldown for moving my city.

I believe this has been an issue in the past for players, but if not here is a reminder.