You're new to the sport, right?
I've recently noticed a lot of olympic-level weightlifters having knee re-bends in their pulls, and I was curious as to your thoughts on the matter. Now, I wouldn't ask you to give advice to a professional athlete you aren't coaching and have only seen footage of, but I predict your experience can shed more light than my lack thereof. Is this an issue like a rounded upper back in the deadlift of elite powerlifters that can make sense in the context of international level competition, or something else?
An example:
https://www.youtube.com/watch?v=2fO9LTQgzRw
You're new to the sport, right?
I'm guessing he also has not read the book.
Or done an Olympic lift.
I do not participate in the sport of olympic weightlifting except as a spectator, and have little experience with the lifts themselves, hence the question.