Well I would imagine as the a/c was only at 14,000 there really was no need to do a split arse descent risking a mid-air with other traffic. At 14,000 cabin/pax don't need o2 anyway and by the time the cabin has climb to ambient, the a/c was probably back at 10,000 with an ATC clearance to do so.
Sounds a text book event to me.