I bought a hue lamp from an Apple Store for my daughters night light and installed it with no problems. Everything was working fine until a couple of days ago the hue app on my daughters iPad says unreachable (she can still change the colour of the lamp and change scenes but cannot dim the lamp anymore). I have searched the Internet to fix this. I have reloaded the app and Reset the hub but nothing seems to be working. Any ideas or help would be appreciated.