Definitely try a new standard-weight recoil spring. It's possible that it was out-of-spec to start with (mistakes happen), and it's possible that it's just used up. Running a heavier recoil spring might make it more reliable, but if it does that's treating the symptom, not the disease.
Assuming your ammunition is in-spec and the pistol's timing and extractor tension is correct, it sounds like you have drag somewhere. "Tight" pistols need to have smoother running surfaces in order to function reliably.
Rough surfaces hold more fouling, so it never hurts to carefully polish all surfaces that the unfired cartridge runs against on the feed cycle: Mag lips, barrel / frame feed ramp (don't know which one your pistol has), relevant extractor surfaces, and chamber mouth.
Additionally, you can polish the running surfaces where the extractor bears against the slide. Also the complete interior of the chamber. Aside from reducing unnecessary friction in the feeding system, polishing these surfaces will mean less buildup of fouling in general, allowing longer stretches between cleaning.
Hopefully this will take care of the issue. If not, polishing the lockup surfaces might help, but you've got to be super careful with that.