Are you running the latest version of MC, 24.0.78? There have been some DLNA fixes in later versions.
I see that you have more than one DLNA Dynamic Zone on your system. Three actually. Do you have a DLNA Server associated with the Denon Receiver, which I assume is named "WOODSHOP DENON"? If you don't know, right-click on "WOODSHOP DENON" under Playing Now, hover over "Associate with DLNA Server" and check. When you only have one DLNA Server set up in MC, then MC automatically associates every DLNA Dynamic Zone (Renderer) with that Server. If you have more than one DLNA Server set up in MC, then you need to associate one of them with each DLNA Dynamic Zone.
As you do have three DLNA Dynamic Zones, which are DLNA Renderers, you should probably have more than one DLNA Server set up in MC, unless all your Renderers have the same capabilities, in which case you could just use one DLNA Server, and that would be associated with all your Renderers automatically. I suspect that your "Anthem Home Theater" has different capabilities to the "WOODSHOP DENON" and "PC DENON X4100W" Renderers.
If you do set up multiple DLNA Servers in MC, you should configure them to match their target Renderer(s)' Audio, Image, and Video capabilities.
If none of that fixes it, right-click on "WOODSHOP DENON" under Playing Now, hover over "DLNA Controller Options" and select "Disable SetNext Support (for broken renderers)". If that still doesn't work, try changing the other two settings.