the guess callback is not being called before the stpper executes a step.
this is correct as far as the predicted state, but it is wrong for the history because internally the stepper updates the history so the previous state is now being copied to be equal to the guess which is wrong. the guess should not impact the history
the guess callback is not being called before the stpper executes a step. this is correct as far as the predicted state, but it is wrong for the history because internally the stepper updates the history so the previous state is now being copied to be equal to the guess which is wrong. the guess should not impact the history