Is there a proper sequence to powering on the M600, LB Controllers, and iPAD? Sometimes when starting the M600, one or both controllers may not register the aircraft.
Thank you

It should follow the same sequence as other aircrafts. Normally you turn on the RCs first and then the aircraft.

Definitely turn on RC and then the Matrice.   If you turn on the M600 first you will have to turn off the DJI go App and restart it.  You can avoid all of that by simply turning on the RC units first.

Does the issue seem to persist?