1.7.5 Minecraft OP Realms Bug

Hello Mojang!

I've been having a issiue on my Minecraft Realm, wen a player join the realm after accepting the invitation, the player is OP'ed with all permissions, thats really annoying wen i invite new players that likes to cheat
After a wile they get de-opped automatic, please fix it, i dont like that anyone else then me (Owner of the realm) has OP on my realm

Thanks
LeonTG77