Lutron Caseta Issue

I am having a strange issue adding a new caseta dimmer to my hubitat integration.

When I add the integration as d,4,Foyer Ceiling Lights the device does not show up. Then I change it to s,4,Foyer Ceiling Lights, the device shows up and I can force configure it as a dimmer in the device settings and it works fine, I am able to turn on/off and dim.

Why wont the integration just work with d,4,Foyer Ceiling Lights? This is really strange.

What dimmer model number?