If I remember correctly, Punk's side of the story is that in his final months with WWE, he was sick or had some sort of injury and one of the company doctors said it wasn't serious and just kept giving him Z-Paks which didn't help and eventually (in Punk's words) lead to him shitting himself on the way to the ring on Smackdown. He was miserable and when he did receive time off, Vince would call and want him back immediately. All of this happened years before the pandemic.