Hi - I am trying to run my opto-insulated ESC's from Radiolink Pixhawk PX4. To provide power I am using a KDE UBEC UAS22 , with jumpers set to 6v. However, upon plugging into PX4, all PX4 LEDs go off and I can no longer communicate to pc via serial. Disconnecting from UBEC restores the normal PX4 behavior , but I am stuck as I really need to provide the ESC with power to start the motors. Any hints are aprechiated (PS.: If I power the ESC through the UBEC on RC receiver (disconnected from PX4), the motors run - which seems to indicate the UBEC is ok ?