On the replay, I see the receiver running into to the DB who puts up his hands to protect himself. I think it was the back judge that through the flag.
Huh? Lynch is going to the sideline and the DB has inside leverage and they collide. The DB clearly gets his hands up and extends his arms, Lynch is only looking for the ball. I'm not sure it's DPI, but it certainly ain't OPI.
"Each player has territorial rights, and incidental contact is ruled under “attempt to reach…the pass’’ in Rule 7-3-8. If opponents who are beyond the line collide while moving toward the pass, a foul by one or both RULE 7 / SNAPPING AND PASSING THE BALL FR-79 players occurs only if
intent to impede the opponent is obvious. It is pass interference only if a catchable forward pass is involved."