The Penguins are the current Cup champions. That brings a certain cachet with the officials to begin with. Add to that all the narratives about a certain #87, and it is no wonder that even officials can be swayed by what they read.
This is not going to be one long complaint about the refs. Heaven knows that gets us no where. But it is important to point out ( and this is prevalent in all sports ) that narratives told can have an affect on the game itself, and ( surprise surprise ) sometimes stars get the calls.