I've been using 2-X90 devices for well over 2 years and have been reasonably happy with them. I moved about 8 months ago and the location choices for my Deco X90s made it so that the satellite unit was performing well under half the speed of the main. So, I decided to upgrade to the XE75 Pro versions to get the dedicated WiFi 6 back haul. The difference is amazing. I'm getting very fast speeds from both units (placed in the same location). 

Unfortunately, my Ring cameras and my August locks started intermittently dropping off the network and then coming back on within a minute or so. I read that there were issues with Ring and tried all of the methods mentioned online - I even created a secure guest network for 2.4 GHz devices. No improvement. I finally decided to disable the guest network and put up one of the X90s on a separate network and then added all of the troubled devices to it. Everything now works fine.

It's disappointing that I had to do this because I was going to donate the X90s to a place that could use them. 

So, help me understand why the XE75 Pros can't handle Ring and August lock devices, but the X90 can.

Thanks!

Mark