I have a theme for the frontend and I use "seven" for the backend as I set it on
I created a new role: "power user", which is a limited access to the different content types. The "power user" role has access to the "View the administration theme" permission.
I created a new user, assigned it to the "power user" role and when I edit a content then the page is displayed by my frontend theme instead of the admin theme. I tested it on 2 different drupal systems with same results: 8.3.1 and 8.3.4. The admin theme works for the "administrator" role.
Any idea how can I fix it?
Is this a bug, or there is something else that I forgot to set up?