I use Light Flow Lite for my notifications and everything works fine. I just recently changed my Lock Screen options to have a pattern to unlock my phone instead of just swipe. Now I don't get any LED notifications for my K9 mail. I tried turning of Light Flow and use just the k9 mail led notifications and that doesn't work either. I turned off the pattern lock and went back to swipe to unlock and my LED light is back. Does anybody know a fix for this? I also just installed Advanced Screen Control to swipe open my phone if that makes a difference.