Why Can't I Filter for Groups in the Search Pop-Up?

We're on version 12.1.2.21912

When I try to search for one of our groups, called "Artificial Intelligence" it doesn't immediately appear in the list, and I can't filter by groups:

It's similar here on the Verint community, except in this instance, the group does actually appear at the top of the list even though you can't filter to show groups:

Also appears to be the same that you can't filter for 'applications' either but they may also show up in the list? Doesn't quite make sense.

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