well keep in mind, that esc is a hobbywing ESC under the covers. But like the orion it requires a special box. It maybe even use the orion box. Anyway, HW esc's slow down once they hit lvc. So I would definetly try to check the lvc on the esc. Also, if you can try a different motor, do that. You can also disconnect the sensor wire. Since that esc with switch to sensorless, you can rule out sensor board or cable issues.