Unable to switch gamemodes

When using Minecraft Realms I am unable to switch from survival to creative either using the setting menu or commands. When switching with settings it does absolutely nothing and when I try to switch using "/gamemode" it goes into creative for maybe 20 seconds or even shorter. I've also tried to download a copy of the world then switch the settings and reupload it to realms but that doesn't work either. There is a huge issue with realms limiting a lot of settings options then not being able to use commands to change them in-game, like using day-lock with doesn't work either.