On my LG Phoenix 2, the Marshmallow Gallery always displayed pictures properly. But ever since the Nougat update, the Gallery fails to render a few of my pictures properly. The thumbnail suggests that the whole image is there, and initially the full photo displays at low resolution while Gallery renders the high resolution. But when the high resolution appears, some horizontal section of the image (a full-width rectangle starting at the bottom) is black, while the remaining part is shown correctly in high-res. There is nothing wrong with the stored imaged because Google Photos also fails to properly render the same images in the same way on my phone, whereas the same online images render perfectly using Chrome under Windows 10. A friend of mine suggested that Google broke their decompression algorithm in Nougat. Any ideas or word of a fix?