BG, the camera angle showed AF in front of Carter, then moving left - there was no one to his right to cover Carter, hence the gap Carter spotted. I don't doubt AF thought there was someone to his right, but there wasn't, and the footage shows he should have been covering Carter ready to shut him down, not shaping up to move off his pass to the next player. Had he done so and been outplayed by the chip, I'd have seen it differently - but he wasn't.
Harsh call? I don't mean it to be, the game was riddled with errors on both sides; it was an intensely pressured game, I merely mean this was an error on his part demonstrative of my concerns regarding his defensive play when that is ostensibly his strength. Would TC have done so? Who knows, personally I think there would have been less risk of it. Would he have been beaten by the ball? Probably - but Carter might not have been in a position to pick the ball up after.