Continuity mistake: A surfer snaps his neck while trying ride a dangerous wave. Afterwards the surfer is washed ashore. He is out of the water, but when the lifeguards arrive he is offshore again. (00:32:05)
Visible crew/equipment: As you see the surfer starting his ride the camera goes underwater, briefly revealing one or two scuba divers and a gadget (most likely a camera). (00:32:30)
Answer: She left to pursue other TV, movie, and commercial opportunities. It's a typical scenario where a breakout star on a hit series leverages their popularity for better roles and more money.
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