First question, do you play live in the same position you practice? Second........same strap height/bass/clothing style as when you practice?
If you practice sitting, and gig standing.....prob. If you practice leaning against a wall....prob.......
If you wear t shirts to practice and leather straps to gig.....prob....
If you wear wristband/brace at practice and not at gig (or vice versa)..prob....
There's something going on thats changing your technique.... gotta be a way to fix that
