Problems with Activating Spotlight Cams

I have several Spotlight cams and within the past 48 Hours there have been issues with activating a live view and the recordings that are shown are usually just black. I use Xfinity high speed Internet, but if I try to view using my cell service the camera live view seems to work most of the time. So it seems to be an Xfinity connectivity issue. My speed tests all show very good speed and I am not having issues with anything other than my Ring devices. All the devices are connected to the WiFi and are in the ‘green’. Any ideas as to how to correct this issue? I am sure if I contact Xfinity they will claim it’s a Ring issue and Ring will call it a Xfinity issue. I have done All troubleshooting I can do i.e. rebooting router, modem, and have even uninstalled and reinstalled a couple of the Ring devices with no luck. Thanks for any advice.