Artefacts of map stitching

Hello everyone!
I tryed DD for several times for making 3D map and 2D also. And found that there are many artefacts on buildings or other high objects in 2D map. Here is one example: I flyed on good high (75 m) and with good overlaping (70%), but I didn’t get good map =(
I use DJI Phantom 4.
May be you can give me some advises how to avoid it? Thanks!


The common image :