Blue light blinking despite no notification On my phone, the blue  light is blinking. However I have no notification. What could explain the blue  light?

I use on Android 6.0 with LG G4.
I just bought my Alcatel Idol 3- 5.5 just a week ago and I had this same problem. The way I fixed it was by doing a device reset (Setting- Backup&amp;Reset-Device Reset) when I restarted my phone it prompted me to do a system update. I did that and the problem went away.No more flashing light!