Invalid prop: type check failed for prop "editable". Expected Boolean, got Null

As an anonymous user, view a merge request and you will see this error in the JavaScript console. editable is omitted in the JSON response:

{"time_estimate":0,"total_time_spent":0,"human_time_estimate":null,"human_total_time_spent":null,"participants":[{"id":1,"name":"Administrator","username":"root","state":"active","avatar_url":null,"web_url":"http://localhost:3001/root"}],"subscribed":false,"assignees":[]}