Unable to change realm mode

Hi, I'm an italian Xbox one user and I have subscribed 1 realm "+2 friends" named "Creeeeepers!!!!!!" . I'm unable to change realm mode. I switched game mode from "creative" to "survivor" but ingame nothing changes. I tried also to switch game to "adventure" but realm seems freezed to creative. For me and any friend from different devices. Could you verify and fix it please?

Matteo|