USA 32 broke apart on September 13.

It seems obvious to me that this is related to an announcement the very next day - September 14 - wherein Secretary of the Air Force Troy Meink publicly confirmed for the first time that the US has active "on-orbit space control weapons" circling the globe.

Either the US destroyed its own decommissioned satellite as a public weapons demonstration, or the sudden "breakup" forced the Pentagon's hand to make the announcement.