How to enforce a required tag for topic creation in a specific category via theme JS (Blackout theme)?

Hi,
I followed the steps.
I created a Tag Group and added a single tag to it.

  1. In the category settings, under Tags > Required tag group, I selected this tag group.

  2. My expectation is: when creating a new topic in this category, at least one tag from the required tag group should be mandatory.

However, the system is allowing topics to be created without any tag from the required tag group, which defeats the purpose of this setting.

I’ve attached screenshots showing:

Can you please help investigate if this is a bug, or if I might be missing something?