I have a 90 mile radius Repeater south of me that I can hit from 65 miles away, and another with a 65 mile radius roughly 50 miles away. The 90 mile radius repeater is by far the busiest of both, but confident I can hit either one from most places I offroad.
I had the same problem with mine, contacted Midland for advice, but was on the weekend. Before they contacted my back, I got impatient, and just did a Restore. Scan function began working, problem solved
2012 JKU with a Cobra 75WXST and Firestick on the rear, a Midland MXT500 mounted on a Proclips mount (removable) and a 6db Midland antenna mounted on a iJDMTOY side mount (Amazon). Reaches out and touches someone roughly 78 miles through a repeater (Granite Falls to Tacoma).