@David-TP Thanks for your reply. I was only stable on 1.5.7 Its hard to know as im not at home all day, at the weekend it was once each day The topology is like your second map, I attach a screen...

I have 4 M5s in Access Mode, so one wired to my router and 3 around the house. For over a year they have been super stable until I updated to firmware 1.6.1 now they randomly disconnect from the...