With your gun hand, are you squeezing from the middle of your fingers (middle phalanx) on the front strap? Or are you squeezing more from your fingertips (distal phalanx) on the side of the grip?
Fingertips squeezing the side of the grip could cause issues, and I'd say is fairly common.
I liken it to grip method with grip trainers. You don't close them like most think you do. The proper method for those is more of a "C" shape with the hands, forcing the thumb forward while bringing the middle digits of your fingers backwards, like this:
https://youtu.be/jeiJv-zhCjM?t=145