I fixed something confusing about the UI that might be what you’re describing.
- A tag “ford” is restricted to be used in a category.
- In a different category, try to add the “ford” tag.
- Someone who is allowed to create new tags sees this, and you can add “ford” to the tags input:
- Someone who is not allowed to create new tags sees this, and can’t add “ford”:
The second case is correct since no one should be able to add that tag in the wrong category.