Completely random with no identifiable screen indication. Not associated with a particular function. I will do as you suggest. Thank you for taking the time to trying to reproduce. Will post response with results.
I tried at a few different heights from 10-20 feet. Toggled to home when about 30 -50 feet away. May just a subtle change in height but not much. I recall that the one i had a couple years ago would ascend when this close to home.
I just purchase a refurbed Q500 and it came with an ST12 controller instead of the ST10+. All seems fine except the controller randomly beeps and I can’t figure out why. I was flying without a card so not sure if this could be it. Any thoughts much appreciated.