This could be bad for GM

Twice the wifes 2016 chevy 1500 5.3 crew cab short beds brakes went away at idle while making a multi point turn around in a crowded parking lot.
Both times the engine was at idle. Both times I got it in neutral/park quickly and run the rpms up. Brakes came back.
Took it to one of my chevy dealers and complained. Mechanic says their seeing this a lot. Service mgr says he hadn't heard anything on the issue. :R