Hi. Am new here and to drones. Just bought a mini 3 pro and really enjoying it. Am confused by a blinking led upon power off that has just started after a few flights. It's the fourth led on the drone. I did not see it the first few times....Happens with full or partially discharged battery. Am I missing something? (and yes I have looked in the manual and it mentions heating issue but the drone has been off for hours?) Thanks!