It most definitely touches his arm and this angle confirms it.To me this looks like it goes from thigh to thigh and doesn't touch his arm...
I'm considering this 1 point dropped due to PRO.
I got to the part in the video and then hit “play/pause” as quickly as I could until it got there. Almost immediately after it first touches his knee, it touches the forearm and that is what keeps it from bouncing to Santi’s left.