Every night around 3:30 my internet goes out.

This is every day, always around this time (I know this because I often wake up in the middle of the night and browse the web).  It has only started happening since Xfinity "forced" me to change modem/routers (to another of the of the same kind) because they "discovered" a problem (they shipped me the modem).

It is wreaking havoc with my work from home schedule because it logs me out of my VPN and I have to restart everything in the morning.