Thanks for the reply. When I did bodybuilding from 17-31 I never flat benched, only incline, dips, and isolation chest exercises, i did do a lot of btn presses too. I am certain my form back then was probably awful, but luckily i stuck to moderate weights and generally worked for a pump, never caring for crazy strength gains.
This rotator cuff work im doing seems to be fixing the problem. I'm fairly confident my bench press form is not perfect but decent and im definately still working on improving it, if this problem comes back i will post a video of me benching heavy and try to get some insights on what i may still be doing wrong.