I heard Ben Leber break down what happened on that long run, and it makes perfect sense. If you watch it again, you'll see Harry was on a blitz coming on the right side. Ben stated when that happens, it's the MLB that has to fill in for the blitzer in pass protection, if it's a passing play. That's exactly what happened. Kendricks immediately went to the right side, and Miami called the perfect play and ran left exactly where Kendricks would've been had he not moved.
Ben stated Eric messed up by filling in the pass protection coverage "too soon". LBers are coached to stay put, and wait for two or three counts before filling in for the blitzer on pass coverage. Zim took the blame stating he had made a bad call, but if Kendricks didn't leave his spot so soon, that long run most likely gets snuffed out.
Leber mentioned he was sure Kendricks would be having some conversatations with his coaches about that particular play when going over the game films.