Ideas
I don't know English and I'm writing through a translator, so sorry if there are any mistakes.
I encountered the same problem. My character takes a selfie, then if I exit the game and come back, the photos will turn black, regardless of whether they are in the inventory or on the wall.
But I also noticed that if I take a photo, go to another house, then return home, exit the game and come back, the photos do not turn black.
I checked this with DirectX 9 and DirectX 11 enabled in turn. I checked with both old and new saves, with and without mods, and the problem remained the same in any case.
My save as an example: https://drive.google.com/drive/folders/1OB9X1GKAH1IE3KPuAaVHBijcNiW81b1x?usp=drive_link
PC Windows 10
Do you exit the game completely and come back? Or just save and exit to the main menu?