Arrinkiiii,
I downloaded your DNG image and put it into Adobe Camera Raw... I noticed that the processing presets were set to "Camera Default" and not "Landscape, Portrait, Faithful, and/or others." The processing presets are located on the tabs adjustment area. It's a pull-down menu.
I think what's happening is that the "Camera Default" preset is putting too much emphasis on highlights and the details stored in the highlights. Switch over to "Landscape or Portrait" and there is no funky banding, stitching, or pink sun at the native exposure values.
FYI; Almost all DNG images, when lowering the highlights far too much, will produce pink sky and pink sun effects. What changing the processing preset does is better defines where shadows, mid-tones, and highlights actually reside.