Never had any problems like that with mine. Has yours PPK had the recall already completed? Not that this will cause the problem you have.
Here is the website to check for the recall
Only thing I notice is using "crap" rounds will not push the slide back enough to actually load another round. Even after breaking the weapon in, these were made to use a more "hot" euro round so just be careful using the cheap stuff.
Hope you figure this out man!