Hi @dcc137, sorry for the delayed reply here. Can you tell us what the hardware model is for the Comcast router, and if it has a manufacturer name?
In some cases specific issues are introduced with router configurations. For instance, in the past we’ve had positive results by disabling “Wireless Isolation”, Enabling RIP settings to RIP1, and disabling IPV6. It might be worth trying some of those options (or their equivalents) on your router.