I know you're supposed to pinch your shoulder blades on flat bench - it feels proper.
It used to feel fine on incline as well but the twice in the past two weeks (attempting PRs) I've felt something just under my left shoulder blade "pull" as I'm pressing and result in some weird tingling throughout my left shoulder/arm and a bit of neck pain when I turn my head.
The first time it resulted in some weird residual pain in my shoulder area that would hurt only when I coughed. That went away today, so I decided to try again but the same thing happened - pulled the same thing under my left shoulder blade, same weird sensation going down my arm, a bit of neck pain when I turn my head.
The weight is reasonable - I'm not straining myself too much and maintain steady form while pressing.
Do you pinch your blades on incline? What could be causing this?