I'm not sure if it's just my set-up but if I have PowerFlarm Core talking to SD on my iPad and have noticed that if I have the Air Connect device also logged onto my iPhone (which is in my coat pocket) I seem to get issues. The answer was to go into settings on my iPhone and delete the SSID for the Air Connect device (I.e.: 'Forget This Network') so that it couldn't automatically connect.
It seems that the Air Connect device only seems to like 'talking' to one device at a time and giving it its whole hearted attention!!