I hadn’t heard of it happening with the FNP, but I had with the FNX, which was why I asked. I’ll see if I can dig up the post, I believe it was from FN Forums, which are usually overly pro-FN. If they’re complaining about it, chances are it’s an issue 
I own an FNP-40 and it has been trouble free through 2000+ rounds. I consider it a good value for those that like DA/SA hammer fired pistols. Some early models (pre-2007) had a design issue with the fire control group where they would crack due to a cut-out-notch in the FCG wall. FN changed the design of the FCG and I haven’t seen any reports since. Some pistols experience minor slide peening on the left side under the ‘P’ above the take down lever. Just a minor cosmetic issue similar to the peening you see on the bottom inside edges of a glock 22 slide where it wears to a certain extent then stops. I believe these issues have been addressed in the new FNX design. I have had no issues with the decocker’s on the FNP and I don’t particularly like the construction of newer FNX levers.
FNH will also be releasing a striker fired version called the FNS sometime soon.
That was a good review. Better than the others I’ve seen. All of the pics and vids of guys shooting the FNX taken from the strong hand side, so I haven’t seen the thumbs placement on the pistol to see where and how it interacts with the decocker/safety.
I really like the pistol on paper, can’t seem to find any range that has it for rent, although they all have it for sale.
CDNN has them on sale for $499 shipped right now. Buy it, and if you don’t like it, sell it for $450 with a minimal loss. If you’re seriously considering it, now’s the time to buy one.
Last year I almost bought a FNP in 357sig but a bit of research turned up the same things listed here already. A poor CS department, non-availability of parts, virtually no after market parts support and numerous issues that although seemed minor led me to believe that FNs full attention is on military/govt sales and not private indivduals. No Thanks and on another note have you even heard of a PD issuing or authorizing a FN product ? Must be a reason for that since their pricing isn’t too bad.