This is affecting me as well. I downloaded the world and noticed that turning your building privileges on and off works, however only for the downloaded world. I tried this on realms, however it seems that you can not change permissions of players in realms. I do not know if that is a glitch too or not. I then tried reuploading the world where I flipped my permissions on and off, however I was still unable to build on realms.Video Proof
This is affecting me as well. I downloaded the world and noticed that turning your building privileges on and off works, however only for the downloaded world. I tried this on realms, however it seems that you can not change permissions of players in realms. I do not know if that is a glitch too or not. I then tried reuploading the world where I flipped my permissions on and off, however I was still unable to build on realms.Video Proof