Hi there

I have been using my 3xDeco unit set up for a number of years without issue. All units are on the ground floor level, the main unit and second unit one room apart (approx 8m) and the third unit is in an outer building which is separated from the second unit by a window and a wooden wall (approx 2m away). The WiFi strength is constant and very strong, however since applying the most recent firmware update, the signal strength across the units has decreased and will no longer reach the third unit. I would greatly appreciate any help or suggestions on how to resolve the issue please. 
Many thanks 

Crimmys