You are able to keep your hands in one place now, no more little shuffles
Looking at the place the A/R broke and the lateral g loading (<1), it must have been metal fatigue. I have not come across a bar breaking, the end links, yes, but not the bar. Except in cases where during manufacturing and bending when the bar is not properly cured before bending which creates a week point on the bends. And given that you have relatively high spring rates, it must be a manufacturing fault IMHO.