I installed the S515D Kit this weekend for my under cabinet LED lights (5 lights all controlled switched together). The installation went fine and the dimming was working smoothly. Everything was working fine with the intermittent use of the lights including dimming from both switches physically as well as the App. However after several hours the dimming functionality is not working from the physical switch and the App.  I can still use the switches and the App but the lights are always at highest illumination. Please help.