I’ve sometimes had a tendency to pull left for other reasons than the classic ones and I’ve found through some slow and dry fire exercise that I will easily tend to favor pulling the sight to that side; just sort of where my hand likes to point. Sometimes I can get around it easily and other times I just keep drifting that way. Seems more prevalent with indoor lighting. At other times it is me yanking the trigger and I often recognize poor hand/grip control right away, but at times it’s just the way I’m aligning the sights-and it’s going right where I was pointing.
It’s still my fault, but two common reasons why I miss left.