RBK750 Series - Firmware Update v4.6.3.7

My experience with the V 16 upgrade is mixed and hard to understand.

As suggested, I powered off all my devices and let the nighthawk docsis modem sync up, and then repowered my main router, let it sync, then repowered the satellite.

I did not do a factory reset which the Netgear admin said was ok.

For about 10 hours, everything was great. Download speeds as measured by the Orbi app were back to 900 mb.  Thruput - both wired and wireless was excellent: 600 on wired connections and 400-500 mb on wireless.

Suddenly the wireless thruput as measured on the speed test dropped to 10 - 20 mb. The hardwired speed test had not changed.  The Orbi app still reported download for ~800/850 mb but there was just a trickle of data being pumped out of the system.

I have several wired devices (an Apple 4k streamer) connected to the satellite.  They were stuttering and buffering all over the place.

I checked the modem and the connection, SNR, and power levels were all nominal.  I do not think it was a provider issue.

I repowered the base station and the satellite - let everything sync up and now I'm back to 400 - 500 mb wireless.

Does anyone have any thoughts?  

Last point:  this was the behavior that the migration to version 4x initiated.