The median house in McLeansville was built around 1983, which puts it right in the middle of the wider area's 1968-2002 build window and close to the regional median of 1987. Doors and hardware from that era are now pushing toward 40 years old, and track brackets that were installed once, with the fasteners of the day, are the parts we see loosen first.
The climate here is cold-moderate, and that swing matters for off-track failures more than people expect. Track alignment that was fine when a garage was built can shift slightly over decades of seasonal temperature change, enough that a roller catches an edge instead of riding smooth. On a door that age, a cable that's frayed from thousands of cycles can finally let go, and an unevenly supported panel is what pulls a track bracket loose.
We also see off-track problems triggered by someone trying to force a stuck door down or up by hand. On a house built in the early 80s, that stuck door is often a sign the track was already slightly out of true, and forcing it is what finishes the job of pulling it off the rail entirely.