Only thing I can think of, which may or may not work, is to try doing a master reset on the hub. On the bottom of the hub is a little tiny hole, inside that hole is a button. When I had to do it I used a toothpick to push it. In my case it was because the hub wouldn't discover a new bulb I had bought. Note-this will scramble the bulb numbers. For example, prior to the reset I had bulbs 1,2,3 in my living room, 4 and 5 in the hallway, etc. After the reset they were all jumbled and now it's more like 1.8, 12 in the living room, 2 and 15 in the hallway, etc. It was a major pita to figure out which numbers corresponded to which bulbs and which groups they belonged in.