It causes stress and electrical failures to run from who you are. Life in a closet, keeping your guard 24 hours a day... Come clean. You ARE a left handed shooter! See! Wasn't that easy! We are still going to love you!
I think when you shoot right handed, you might be twisting the gun slightly as you pull the trigger. It does not happen with your left hand, because your grip is slightly different, perhaps not as tense, or in some other way.
Try to relax your dominant wrist slightly, and be sure you pull with your trigger finger only, without squeezing the grip harder. Our fingers naturally tend to flex in unison, an instinsctive grabbing motion.