esc current sensor

trying to setup racerstar 35a 4in1 ESC to a flip32 omnibus f4 v3 flight controller. found a good 4in1 esc tutorial on youtube by blue falcon which connects a 4in1 to a omni f4, but i cannot get the current sensing to work. i am connected via dshot600 and ibus and can fly the quad fine. is the...