Caps-Man clients having Layer 2 discovery issues?

Title says it.

Have an install with caps-man running on 3 APs. There are several devices that need to “discovery services” via broadcast. when connected wireless… the services/devices do not show up in MAC discovery. However… the devices are reachable using the IP of the device.

I have client to client forwarding enabled.
Arp enabled.

Anywhere else I should be looking?