I have recently purchased 3xXE75 to improve the performance of my WiFi.  I have an OPNSense Router/FW with DHCP for my home network and so I placed this system into Access Point mode.  It replaced my old Google Nest mesh system and I used the same SSID & Password so that devices would connect automatically.  I have about 50 WiFi devices including my Samsung S22, various IoT devices and Nest IP Cameras and Google Nest Screens throughout the house on wifi plus I have a small "homelab" of servers and desktops which are all hard-wired to my switch (GSS116E)

I have placed the main router centrally upstairs and wired it into my switch.  I have also hard wired the other two devices, one of which is on the main floor in my Office near the front of the house and one that is in the basement near the back of the house.  My Deco App shows strong wifi connections with my devices and shows the hard wired backhaul and "everything looks good"

I have disabled Smart DHCP, enabled Fast Roaming and Beamforming and again, Operation Mode is Access Point.

I can join the wifi on all devices and everything works well except randomly devices will go off line for several minutes and then reconnect.  In the case of my phone, I can still see a strong wifi connection but there is no internet and no network connection.  If I disconnect wifi by turning it off and then immediately turn it back on, it works fine.  I frequently have problems when I move from the front of the house to the rear of the house but other devices which are stationary also suffer from this problem about once per day.  If I open Deco app while in this state, it will not start up so it is not just internet but local connections.  If I use another device to check, it shows "everything is okay".

In call cases, the solution is to disconnect and reconnect.  I do not have these problems with my homelab which is all wired, nor my desktop which is also hard wired.

I do not live in a particularly congested area being a quiet residential street.  I have run "network optimisation" and it claims to do things but nothing happens. 

When these problems do not occur, wifi performance is satisfactory.  I have owned these devices for about two weeks now and the nodes have not been physically relocated since setting them up.  I have cleared the log files momements ago, so the next time this event occurs I plan to check to see if there are any log entries.

Any suggestions?