Preconditions:

prod mode is required

Steps:

http://recordit.co/NeGX5LYY7i

1. Go to Admin/Content Types
2. Click button
3. Fill required field and click Create - notification Content type group created is displayed
4. Click browser back button
5. Click browser forward button

Actual result:

Notification Content type group created is displayed again.

Expected result:

Notification is not displayed for the second time.