Some type of extraction issues. S&W tried to fix it but failed...so they (SHP) went back to Sig's, this time in P226 instead of 229. Guess what...some of the new Sigs have had some extractors break in the first few rounds. I verified that info a few weeks ago. We've mentioned here how some people procure their weapons, the ole "XYZ agency has it so it must be good" mantra. That would apply in this case.
Maybe this thread will answer the question.
https://pistol-forum.com/showthread....highway+patrol