I have 2 Roku Sticks which work flawlessly. The Express + has to be hard reset if it loses connection to my Ubiquity. The Sticks never lose connection and Express is closest to Router. You sent a replacement but still same problem. Once I do a hard reset, the Express connects immediately. Then I have to wait for all the channels to download argggg. There is something wrong with your WiFi code on the Express. Copy the code from the Sticks.