I’ve seen a slo mo and it was just an unfortunate footballing incident in my opinion.
JB was pretty static in the RB position whereas their lad had to make ground at speed to challenge for the ball.
He was marginally late but it was there to be won and it was a genuine attempt to win the ball – he was looking at the ball at all times and he didn’t lead with his arm – ironically had he done he’d have probably been ok but as it was he took as much of the impact as JB did.
It was a free kick because he was second to the ball and his momentum took him into JB but that was the extent of it.