I know first hand of other instances where this has occurred but where the outcome has not been as dramatic.
Part of the explanation comes from the fact that, for a turbine at high power, a small engine speed adjustment is a very large power adjustment.
That i was aware of, but a 100t difference in weight i thought still would have been the difference you would have noticed, felt etc. I only know props so no experience on jets at all so very simple for me to say without knowing i know.
E