I'm pretty sure those slat lines are from the hanger/wall behind it
That was also my assumption as well (and tbh is still my primary belief) but the computer screen reason could explain why the slats "leak" into the image.
On the other hand, my alternative reply is -- who cares.
There are so many artefacts in this image, and modern pictures like this can have "fake" looking pictures actually be real, and have "real" looking pictures actually be fake.
Ultimately we are now more guided by the PRC pla watching grapevine for the legitimacy of new images, than our own eyes and analyses.
For this picture, imo there is enough artefact and noise that we cannot definitively call it fake or real on our own eyes, but if the PRC side is suggesting it's real, then it is good enough for me because the overall image still looks like what we should expect from this angle.
And I do strongly maintain that the overall shape of the silhouette of the aircraft is logical and the "gaps" people see is just the white parts of the aircraft's camouflage.