My take is obviously there’s something off ice. He’s playing with wingers he’s accustom to so it’s not entirely a chemistry thing.
I haven’t heard of any incidents during practice or preseason and I didn’t notice any labored or cautious movements during play.
Maybe it’s mental. Could be he feels pressure and when something doesn’t go like he hoped/planned, he gets frustrated. Or maybe he’s got something in his personal life that’s distracting him on ice.
All speculation but I hope once he puts one in he’ll snap out of it.