Yes, it is very common with new shooters. The worst thing you can do is use the adjustable sights if you have them, and start moving your 7 o'clock flinches to the middle of the target. I know a guy who did this, and once I fixed the sights, I banned him from touching them again! lol!
Trigger type can have a lot to do with this, not just weight. Just happened the other week at my range with a fairly new shooter who was shooting his CZ P10F and had trouble with stray shots. He tried my red dot Shadow in SA, and had amazing accuracy. Tried my iron sighted Shadow in SA and shot well again. Then I got him to shoot a mag from the 7-lb pull DA on the Shadow, and he again, shot very well. We burned the idea in his mind of consistently building pressure on the trigger as the hammer was moving back. Be smoooooooooooth. "Like dragging your finger through peanut butter", as Annette Evans, a coach in the USA says.
He shot very well!
Then we moved back to his CZ P10F, and carried the idea of a consistent pressure buildup on his very different feeling, but lighter, trigger. His group size was almost cut in half. Massive transformation!
So do the ball & dummy drill every time you're at the range. Each time you flinch, I want you to pause, and refocus your mind on what you are doing. Stable grip, with a smooth, deliberate trigger pull. Keep that finger isolated, and go for the surprise break. Keep your other fingers out of it. lol!