Catalina Foothills' housing mostly went up around 1985, which puts it ahead of a lot of the wider Tucson service area, where the median build year runs closer to 1986 across a stock built out from 1980 through 2007. That's a small gap on paper, but it matters for hardware: doors from this stretch of the mid-80s often carry galvanized track that's held up fine structurally but was never rated for the summer swings this region sees. Under sustained heat, the metal expands, brackets that were torqued down thirty-plus years ago work loose a fraction at a time, and a door that's tracked fine for decades starts to walk off the rail on one side.
The other driver is the heat itself. This is a severe-heat climate band, and repeated thermal cycling loosens track bolts and warps track sections faster than it would somewhere milder. A door that jumps track here in July, after weeks of the garage running hot, isn't unusual - it's the hardware finally giving up ground it's been losing all season.