Check for Default Security Rule for EDIT.
Copy Paste that rule and create a new rule by Disabling the default rule or other rules for EDIT won't work.
Sol1: And try adding User Role as Root Admin (((user.roles="RootAdmin")))
Sol2: If you have EDIT rule working for All the Streams and Apps then use !=stream name and try that as well.
((@StreamEnvironment = "DEVELOPMENT" and user.roles="RootAdmin" and resource.objectType="story" or resource.objectType="bookmark" or resource.objectType="sheet" or resource.objectType = "embeddedsnapshot" or resource.objectType = "hiddenbookmark"))
Not sure but above rule should work for only Development stream.
Sorry I do not have access to QMC hence cannot give exact answer.