On that particular route, the aircraft leaves DXB at 10:05am and is scheduled to arrive back from AKL at 5:35am two days later. That looks like perfect timing for using it for the next DXB-AKL departure at 10:05am so that you’d basically just need two aircraft going back and forth until IRROPS or maintenance get in the way.

I would assume that there are many pre-defined route patterns for an aircraft which repeat over a certain period; it may just be more noticeable on a route such as DXB-AKL where the timing looks perfect for just going back and forth instead of something more convoluted with shorter flights.