guns

from the wiki

Unlike other striker-fired guns, the P320 is "effectively fully cocked at rest", since its striker is under constant spring pressure, which is released when the trigger is pulled. Most such guns, including the P320's military variant, have external safeties (like thumb safeties), which the P320's civilian variant lacks. According to gunsmith James Tertin, this is a rare and "uniquely dangerous" configuration. Sean Toner, the P320 designer, has acknowledged in court that "U.S. standards are not very stringent."

This seems to be an issue with this gun specifically, there are at least a hundred incidents of misfires and drop fires that have been reported around this gun and there's a bunch of lawsuits related to it, but I'm not aware of any industry-wide increase in incidents.