Phillip, this has been nothing but honest. After making initial contact with you about this latest failure I waited 3 days on a reply before I posted on here. I'm not one to sling mud but it's very frustrating when an American company will process orders quickly but drag their feet to troubleshoot or retrieve a faulty unit when there is a pattern failure.
We have covered that I'm using a power module. It is however, a 3drstyle power unit from helibatics that i received with a pixhawk. I did not buy it from auav, but it is very much installed and powers the pixracer via the input labeled "power", not telemetry.
I'm also already using opto esc's like you mentioned. I haven't had any problems to date even when transitioning from hover power to emergency stop with damped light on. Much like @luisvale 's video.
So i'm confused as to why the pixracer is dead when it hasn't been disturbed from its gel mounting pads both times I've had a crash. I see that it is designed with the case cradling the edges of the board instead of isolating it from damage. Perhaps the case is taking a bump and transmitting the shock to the board.