76ers star Joel Embiid presents plenty of issues for the Knicks in the second round of the NBA postseason . Not only is he a special talent at center, but he's also the kind of player who loves to work the refs and lean into the theatrics if it'll help his team. Now, New York will be tasked with trying to slow him down, and backup big Mitchell Robinson is going to be part of that plan. However, Embiid is the exact kind of irritant that can stir extra reaction out of Robinson, who's shown he won't back down to anyone on the court. While that kind of fire is an asset whenever the Knicks' backup steps on the floor, it could also burn the team now, or later in the postseason, if he's not careful in this series. Knicks need to keep Mitchell Robinson's playoff technical fouls in check after first round skirmishes Robinson made his enforcer-like presence felt in the first round against the Hawks.…