Concur. The OTG cable has nothing to do with controller stick/button commands (transmitted directly to the drone through the controller antennas).
With some drones it is possible to adjust the camera orientation with a 'virtual stick' input by...
The Mavic Air came with 3 cables:
-Micro USB
-USB-C
-Lightning
You can still buy these from AliExpress.com (and most likely Ebay).
https://www.aliexpress.com/item/1005009186479605.html
If you use the USB-A port on the bottom of the controller...
Have you tried a controller calibration? It may be that your Hall effect joystick is registering slight input in the throttle direction even while the stick is centred. I've heard of drones 'drifting' left or right during forward flight for...
Generally flying near lines will not be a problem. The aircraft is flying in the air, is not grounded, thus random bolts of energy are going to leap from the wires and vaporize your drone.
That being said, yes in the US power lines operate at...