Cybertruck owners have discovered that a chunk of these stainless steel electric pickups could “stop producing torque” while thrumming along. Reports of instantaneous loss of e-horsepower due to duff drive inverters—devices that convert DC to AC and control an EV’s motor speed and torque—might alarm the average EV motorist, but to extrovert buyers of Elon Musk’s flagship, it’s evidence of …