The 1.2.5 V1 20200709 Deco X60 firmware seems to have a lot of issues maintaining a stable link with my devices to itself.  I don't see the lights on the routers changing indicating they are rebooting.  It's only a few seconds of drop out, but enought for VPN and Video conferencing to notice.   I have no Surface laptops on my network.

For a test, I had two of my three X60's in the network.  They are about 10 feet away plus about 12 feet vertically from basement to main floor.    

I ran the VPN overnight so there would be very little network activity from all my devices.  Below is a snip of the extracted log from my VPN software.  Every 2 to 4 minutes the connection isn't stable so the VPN needs to re-connect.  If I'm wired to my modem I don't see a dropout. 

We don't notice this with general internet browsing or streaming with the Roku because the streaming buffers a lot.  When we do a Zoom, Teams or and Video conferencing there is a noticeable hang every few minutes.

I downgraded the firmware to 1.2.4 Build 20200527 Rel. 42769 and my VPN has been stable for about 2 hours.

Unfortunetly, I didn't look through and save the Deco logs before I downgraded.  I might re-upgrade and check out the logs when I have some free time.