Yep. It's flagrant, isn't it? It's what he does match after match. Leads me to wonder if he's been told to do that by Pep. He goes towards the marking defender from a standing start. Well, he doesn't have the blistering acceleration of a Sané, so he knows he's not getting past him.
Very similar phenomenon with Mahrez over on the other side. Mahrez can put a fine cross over, though, from time to time. When Kyle's back, he'll be overlapping on that side, thus creating chances. But Kyle's not eternal.