DNS dropping intermittently with loss of internet connection seen on home network

I have been experiencing this problem for several months and it's a pure annoyance.

When I lose internet access and notice messages to the effect that DNS cannot be resolved for web site access, I reboot my router and generally access to the internet is restored. What is going on with Xfinity DNS servers in the Sacramento/Folsom area? Are too many people working from home these days and Xfinity just cannot keep up?