At a long exposure (from 1 second) dead pixels are very visible, there are a lot of them, and on the standard camera there is nothing like that, for 30 seconds. It's funny that on a computer version this can not be cured, but Capture One and its Single Pixel fix everything.
Sharpness and details are better in dng from Lightroom Mobile than on a standard camera, but Adobe need to somehow fix the dead pixel filter.
Perhaps this is a specific phone problem, there is no way to check on other devices. Use LG G4