In doing some dry fire just the other day, and paying very close attention to things having recently become very frustrated by shooting left, I noticed this as well. The problem, for me, was made worse by the addition of Grip Force adapters on my gen 3 guns...the extra distance to the trigger, while not greatly increased, seemed to cause my finger to be more prone to contacting the frame above the trigger (not at the typical spot along the side of the gun). I removed the Grip Force adapters, and find that I am still very prone to be in contact with the frame above the trigger. While it is avoidable, it is nowhere near "normal" feeling...yet. It is making me strongly consider a platform change....
ETA: I'm assuming this is something I can probably get past with enough repetitions, but the fact that I can pick up a gun I've fondled once and ring steel at 25 yards with relative ease makes me think my efforts may be better invested in improving my capabilities with another platform... Open to thoughts and suggestions, as always...