Or did you mean the "watch one" part is addressed? Sort of, but it's just a video of a render.
Do you mean that the barely-rotating blade would dip into the oncoming wave-front and get snapped?
I imagine that depends on whether "waves without wind" are likely to occur, and whether we can expect waves sizes/shaped so that they clip the blade itself before their rising edge hits the buoy to bump the blade upwards.
If it's someone doing authorized maintenance, they will probably have a rule "do not approach from the blade-side." If the wind is changing that strongly and unpredictably, then it's already a dangerously bad time to do maintenance.
As for low wind and high choppy waves, is that possible? My naive understanding is that these come during storms where it is typically windy