I'm having a similar issue. It seems to be how Xfinity handles a VPN when using the xFi pods.
I also use a VPN at home and have noticed the VPN disconnects (and subsequently struggles to reconnect) when moving between the gateway and the 1 pod I have connected. It seems to be an issue when going from the 5 GHz band to the 2.4 GHz band (and vice versa), so I figured using the pod would keep everything on the 5 GHz band. My reasoning here is that without the VPN connection it goes between the 2 frequency bands with no disruption, but with the VPN it hangs and eventually drops the connection outright.
I contacted Xfinity about a month ago (through the xFi app) with no response, but this seems to be an issue for many since we're all working from home now, and the VPN vendor says it doesn't appear to be an issue on their end.
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