He had a moment at the end of their game at the Final Five.
Game over, he stays on the ice, gets a puck, sets it at center ice, goes in to score on an empty net, and crashes into the net. Gets up, skates off.
After that, he had a medical redshirt year off. I believe he had some mental issues that had to be worked through.
If this isn't correct, somebody please correct my post.
I believe that whatever has happened since, may still be related to mental issues he has. This will be a difficult time for Tyler and his family, I wish them all the best as they work through it.