Hosts appear in Setup but not monitoring

The hosts are getting added to the contact group. All four of the boxes below the Available/Selected box are checked, including “Add these groups as contacts to all hosts in this folder” (see image). Also, when I look at effective parameters for any of the hosts in the folder, it shows the ‘noc-users’ contact group as being associated with it.

The fact that the contact group association is working is evidenced by the fact that the user can see the hosts when they navigate to Setup → Hosts. The hosts simply aren’t showing up anywhere else (eg., Monitor → All Hosts or in the dashboard).

I’ve also tried using a host monitoring rule. This was my original configuration when I first posted this thread. It works the hosts show as associated with ‘noc-users’ when I have that in place (I just put it back to triple check). Same end result, however. From the user’s view, Hosts appear in Setup but nowhere else.

More visuals:
Contact Group:

High level view of folder:
image

Effective Parameters on one of the hosts in the folder:

The user’s view
Hosts visible in Setup → Hosts → (Windows folder)…

Nothing in Monitor → Hosts…