I have a set of 3 Deco M5’s running the most current firmware.  I have a raspberry PI running PI-Hole on my network to block ads.  This is done via pointing the DNS in the Deco’s towards the Raspberry Pi.  Recently my PI had an issue and stopped working.  This caused my internet to stop completely due to lack of DNS resolution.  Obviously i could not use the Deco APP to log in and change the DNS back due to the internet being down.  I logged into the devices through the web GUI on my computer only to find that the settings could not be changed!  THis is the craziest thing i have ever saw.  If you can not make changes in the web GUI, just do away with it as it is completely USELESS!!  I had to reset my whole network due to this unacceptable programming issue.  A few more times of reconnecting 20+ devices back to a network would make me get a different brand router. Lots of these devices are smart bulbs and plugs and are a PITA to connect.