This app was mentioned in 1 comment, with an average of 3.00 upvotes
I experience this with my Phantom 2 Vision. It descends slowly, even if you use return-home to land it. Based on my experience, it's normal.
It will pass once you unconsciously decide you have gotten your moneys worth out of the device.
I wouldn't know, I use Litchi on my S5 instead of the DJI app.