Where are these artifacts in the photo from?

Question

Google

The defect appears when shooting on any camera. Open camera, snapdragon camera, native google camera. In fact, it flickers more often on the display, it is rather dreary and problematic to capture, but sometimes it works.
The device did not understand, did not drown, the camera is intact, did not fall.
Google Nexus 6 (Motorola), XT1103
What could it be?

Answer 1

It could be any hardware issue. I would sin immediately on the train.
The fact that he did not fall and so on does not cancel wear and tear.