Frustrating But, Probably Minor
Only the top round jams?
The EASY possible cures:
1.) Try leaving your magazines fully loaded till the next time you shoot.
2.) Try a differnt brand of ammo. Sometimes that will cure the problem.
You need to see exactly how the round the jamming. Really LOOK.
That is because different things can be happening at the same time.
The cartridge nose might LOOK like it's just not feeding into the chamber but, the REAR of the cartridge case might not be able to move up the extractor.
It COULD be a rough breech face or a "Too Sharp" extractor hook - or too sharp magazine feed lips which are cutting into the cartridge case under the extreme pressure of a fully loaded magazine.
How about if you load one less than full capacity in your mags?
Still not feeding?
There are SO MANY possible little things that could cause that.
Here is another one; Heavy upward magazine feed pressure hampering feed energy to send the top round out of the mag lips and home.
Slightly too much extractor tension.
A slight rough feed ramp.
one slightly too sharp edge on the barrel throat.
Sounds like a minor "street tune up" job possibly needed.
If it's only the top round jamming then that's actually a GOOD sign because your pistol does not have general feeding problems - only one specific feed problem possibly just due to an overly heavy initial "new magazine" spring pressure.