Pods intermittently resetting

I've had 6 pods since March, and they worked fine for the first few months.  For the past 2-3 months however, at random points throughout the day and even in the middle of the night, some of the pods will reset, interrupting conference calls, TV shows, etc.

I've gotten a new set of pods and I have the same issue.  I've moved them around and have the same issue.  I'm ready to sell them and hard wire the house.

It's a huge one story ranch, and it's too long to put the pods in a star around the gateway.  I have pods liked to other pods, and it seems like the ones farther away have more issues (although sometimes the closer ones do too).  When everythying is working connection speeds are fine.

Xfinity customer service has been no help whatsoever.  Thanks.