I just purchased the Deco BE63 (wasn't on the model list above so I had to choose Deco BE65). Generally like it but have some kind of odd problems.

The problem for this post is I just discovered I cannot ping other devices on the local network other than the gateway (192.168.68.1). Attempting to ping another device on the network results in either a "Request timed out" error on IPv6 or a "Destination host unreachable" error. 

If I try to ping the address directly I also get a "Destination host unreachable" error.

I can ping addresses on the internet.

In addition, host names for some devices are not recognized. 

All devices here on the main network. There are currently none on the Guest network and I don't have the IoT enabled.

Device Isolation is disabled. 

Operation Model is Wi-Fi Router.

I'm switching from an Eero Pro 6E mesh network and before that I had an Orbi mesh network. On both of those I could reach other devices on the network. 

At this point I have no idea what to try next.