This is simply a non-violation of the Look Back Rule.
The runner is not required to stop, even with F1 having control of the ball in the circle. All that is required for a runner is to get to a base when F1 is ready to pitch. Doesn't say which base or how many she may advance to.
If she stops, which she is allowed to do one time, then she has one second to either continue in the same direction or go back to the previous base.
She could go all the way around the bases if the defense lets her.
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Tony
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