Preconditions:

• Edit a content type Article and add a new field type e.g Taxonomy Entry Assignment.

Steps to reproduce:

1. Log in to back office.
2. Go to Content / Content structure.
3. Start creating a new content Article.
4. Being on create a new Article form switch to Meta tab (do not fill out any of required fields in content tab).
5. Select product category.
6. Click on 'Publish' button.

Actual result:

See attached screenshot and watch gif:
https://recordit.co/urWUhtaCeL

Nothing happens, user is not informed that some of the fields are required and have to be filled out in content tab.

Expected result:

Content tab should be highlighted which inform user that some required fields are not filled out.