Originally shared by Ingress

Some medals including: Intel Ops, Stealth Ops, Prime Challenge, Operation Clear Field, OPR Live, and First Saturday, recently appeared on your scanner as locked even if you have never participated in the event. Based on your feedback, we’ll be changing these to not display unless you have already participated in the relevant event.
We’re exploring ways to show you this information in a different format in the future. Please note that for now some will continue to display as locked, such as the Mission Day and NL-1331 Meetups medals.
We appreciate your understanding.