I have had to shim the cylinder on both my Pietta's to reduce the endshake to the point where primers get reseated consistently. When the endshake gets excessive, the whole case backs out of the cylinder and doesn't "reseat" when firing. But, adjusting the endshake (headspace) cured this problem on both of my pistols. Using feeler gauges, measure the headspace/endshake with cases in the cylinders and the cylinder pushed as far forward in the frame as it will go. Then, adjust from there. Observe the barrel/cylinder gap as you do this. On my pistols, the cylinder could/would actually contact the barrel when pushed forward. When the gun was fired, that's where the binding occurred. The cylinder on your pistol probably needs to be set back to prevent this binding.
I strongly recommend the Shim Pack, which has a range of thicknesses, from:
https://www.triggershims.com/cylinder_shims.html#S9I have yet to meet an eyetalian pistol that didn't require work on the base pin, or cylinder extension, or adjustment of endshake. They've all been timed well and lock up well, but the subtleties of fitting cylinders to frames seems to have eluded team Ferrari. They seem to 'think' the press-fit cylinder bushing somehow, magically produces a proper end-shake dimension. In my experience, it doesn't.
When the end shake is excessive, the fired cases protrude from the cylinder and cause the pistol to bind at the front of the cylinder, at the barrel. You can confirm this by looking for scrape marks on the front of your cylinder. While you're there, check that the end of the barrel and the cylinder are, in fact, parallel to one another.