It is definitely nocked on the bowstring when handed to her. The Whisker Biscuit arrow rest doesn’t hold the arrow stiffly enough to keep the arrow at 90 degrees without the arrow being nocked. Plus you can totally see that the bow is nocked in the video.
While it is possible that Ms. Dossi deftly and completely surreptitiously un-nocked the arrow then re-nocked it before shooting it, the simpler explanation is that the bow is exactly what you see. And, frankly, trying to surreptitiously un-nock the bow while drawing it is probably more likely to cause the string to slip from her fingers.
You can posit all sort of excuses for her actions, but you have no actual evidence for them other than your disbelief that she could be as irresponsible on stage as she appears to be.
