Mine started out with random unexpected stabbing pain when throwing that arm around. And then when hanging, it would feel like that shoulder was pulling out by a millimeter or so no matter how hard I shrugged against it. And then it just got consistently worse with much worse pain. Started feeling like an ice pic was being jammed in there when exerting force above my head or trying to reach behind my back.

I should've done this a year ago. Wasted time getting out of shape.