I've never had that problem with any of my Kahrs. I wonder whether the groove in the pin may vary or have burrs or something. Perhaps cleaning it out with an itty-bitty diamond file would help. I had one condition arise in a PM9 due to a burr left over from the CNC milling process, and just cleaning one part up a bit solved the problem.
As to the comment Andy05 made,
The gun is shooting well and I really prefer it to my Glock 30SF. I think I will sell my Glock and promote the Kahr to my main carry gun (along with my J frame Smith).
, I, myself, am a revolver guy. But I routinely carry a PM9, a K9, or a T9, depending on circumstances and clothing options.