This kind of applies to weaknesses and strengths of 3-whistle. I found myself out of position early in the season on FT's due to the lane positions changing.
First FT as Lead on a 2 shot FT. Since the players were further from the endline, I was unknowingly positioning myself closer to the endline and lane. This one was brought to my attention by an observer.
FT's as Center. Now that there is a player in the highest lane space, I had to change my normal positon a little to see the lowest block.
It wasn't hard to correct, but it caught me by surprise.