Internet drops after upgrading to Motorola MG8702

Ever since I upgraded my modem/router I have regular Internet drops.  It happens on wired and wireless (2.4 and 5).  This happens when I stream on my PC, Flex box, Google home speaker, Amazon Alexa, etc.  When XFinity couldn't/wouldn't fix the problem, Motorola sent me a new modem/router.  Unfortunately, the problem still occurs.  It's not my PC because I can move to a new Internet (up at the lake home) and I never have any failures.  I can be on hours of video calls and there is never a hiccup.  At home, the problem happens at least once an hour and often more frequently. 

I have had Motorola look at the signal strengths and they don't see any issues.  I also don't see anything of value in the modem logs.

An XFinity technician says it's not their problem because he can ping my modem while the drops occur.  I don't know where to turn to other than change my ISP to Centurylink or Verizon 5G.