Not common, I suppose, but a very good reminder for those who will pay attention to it, just how complicated all the little parts are and how each can affect the operation with others that in turn affect the operation of the pistol.
Makes me less inclined to get upset with CZ if a new pistol proves, over time, to have an issue.
Why? Because an issue like this might not show up during the limited testing/test firing done at the factory since the pistol functions fine but is slowing damaging parts inside. I'll bet a lot people buy a new CZ and never put 500 rounds through it while they own it.
The only way you'd catch this early is to detail disassemble for upgrading (or plain old curiosity). Otherwise it might "wear in" and you'd never know or it might fail at some point and be found during detail disassembly for repairs.
Thanks for sharing this, bringing it up for discussion so others can take note and learn.