The left/right banking before the stall doesn’t happen if the weight is 4400lbs and there is an audible stall warning?
That’s really strange, not only that the weight has zero effect on the stall behavior, but the stall warning is triggered by AoA, nothing else.
As long as there’s no audible stall warning, the aircraft can’t be stalled.
Sorry, but I don’t have a clue what’s going on. 