In the video in the second game at the score of 13-16, a lift is called out at the back line, in the back left corner. It's very close and the call is challenged. After a lengthy wait the hawkeye system shows the animation of what seems to be a smash going long by a mile at the back line down the middle of the court. It happens at the 40 minute mark. What is this? Malicious intent? Technical difficulties? Or just incompetence? Surely if this happened at a more critical moment in the match or if it was a more high stakes game (even though this is a world tour QF) this couldn't just go undetected? Hawkeye is kind of a niche subject, so sorry if this thread isn't in the right location.