Same Term Not Added

[vaprak]

Using latest version of WordPress, default theme, all plugins disabled. Problem first appeared in version 4.8 and continues with 4.8.1.

To recreate the issue:

1. Create regular post (“Posts”)
2. Add a new term to the Categories meta box
3. Save the term (it will appear on top of the list with a check mark next to it)
4. Add the same term again. Nothing happens and the term is not added

Version 4.7.5 and below would activate the term and put to the top of list. This was helpful when adding a string of terms and some of them were already in the database.

[vaprak]

Issue still exists in 4.8.2. Guess it's now expected behavior...