Context is confusing because we arrive in the middle of a story arc, at a point where an unrelated tech snafu happens.

The story arc is about a lost airtag that is living it's secret life in Mexico.

The link is for a post where Apple decides the distance to it's location in Mexico is greater than the circumference of the Earth.

GPS has an altitude component so maybe it thinks either the AirTag or the tracking phone is really high up?

Nah, the altitude component is less than a rounding error at the scales involved.

	▲	ribosometronome a day ago \| parent [-]
		It's clearly in a vaguely geostationary orbit above Guatemala City.