With 564 households in Reese, it's a smaller pocket than most of what we cover out of Saginaw, and a good share of those garages are still running the track hardware the house was built with in the mid-1970s. Fifty years of thermal cycling loosens lag screws in the jamb, and a bracket that's been working its way loose for years finally lets go the first time the door takes any sideways load - a kid's bike leaned against it, a car bumper tapping the bottom panel, or just wind catching the door partway open.
Cold is the other driver. This area sits in a severe cold climate band, and ice or packed snow under the bottom panel is a common way for a door to jump track between December and March - the door tries to close on an obstruction it can't see, the rollers bind, and something gives at the weakest bracket. Checking for a clear threshold before you close the door in winter avoids a fair share of these calls.