Firebase rules continually revert to the default rule

Question

I would like to use this rule but firebase keeps reverting it

rules_version = '2';
service firebase.storage {
  match /b/{bucket}/o {
    match /{address}/{allPaths=**} {
      allow write: if resource==null;
    }
  }
}

I don't want users to be authenticated, there is no authentication for this site. I am only allowing them to write if something isn't in that spot. The rule works for a tiny bit but then stops. This isn't sensitive data and data security isn't important for this app.