Post Badge: Linked Posts?

I want to create a post badge (specifically, on the Details page) for posts that have a Linked Event (or other Linked CPT).

The Post Badge fires when I set it to “Email” or some other field, however when I set the condition to “Linked Post: Event” it does not fire (even though that Place has an event linked.)

Is this by design? Or is something wrong?

How do I display a Post Badge if a Post has another post linked to it?