I’m a fairly simple person.. so this is how I diagnose my bench ( pretty close to a pushup )
If I can’t keep my shoulders in a good position( shoulder back/ get extension ). My shoulder rolls forward and throws my elbow out. Todays Daily Rx kind of exactly explains what is going on with extension and internal rotation.
I cannot keep my torque If I let my shoulder pop forward. I can if I keep it back. I keep it simple stupid like that.