I have a map that uses feature services with related tables. In collector we use it to edit the related tables while the feature itself stays static. I added this one of the service to a new map because we wanted to break it out for its own separate map. On the original map i can still edit the related table but when i go to edit the table in the new map it doesn't give me the option to edit.
did you enable edting for the related table?
Yes the two maps are identical as far as i can see. Honestly we are wondering if it has something to do with that service being edited in multiple places.
Try creating a copy of the original web map instead of adding the service to a new web map.