I have been using my AX72 Pro with an Arris S33 modem for 2+ years without issue.  As of Monday afternoon it started dropping internet.  Not trusting Xfinity, I immediately blamed them.  I even went as far as buying a new modem and set it up. Same issue.  After Xfinity came out and tested everything including the modem output, we concluded that the isssue is indeed with the AX72 Pro.  I performed a factory reset and the issue still present itself after ~1 hour.  I just setup a new Nighthawk 7 (reluctantly).  Is there anyway to salvage this AX72?