Lehner's been extremely commendable for speaking out about his mental health struggles. He used his Masterton Trophy acceptance speech to discuss it and gave us one of the best quotes ever.
He's open in that he was diagnosed with bipolar 1 with manic episodes along with PTSD due to abuse and addiction.
Now whether calling this schizophrenia psychosis instead of a bipolar manic episode, or whatever it might actually be, I think that's missing the forest for the trees; the important thing is that he's clearly not doing well and we all hope he gets help.