I have a related problem. I am not able to share an image from the gallery to Signal, but when I add the same image from inside the Signal app as a file, it works fine.I have some question about the camera. The phone is showing the photo in the gallery, but if I transfer the image on the PC they give the "Quantization table 0x00 wa not defined" (IrFanView message).
Also when I try to share the photo on whatsapp or make a photo in whatsapp the photo appear a black screen (after the photo is done).
The phone is just freshly installed and I've rooted it.
Attached the image I've made on the phone.
Images are not displayed correctly when plugging the phone to a Windows PC. I am however able to copy the images to the PC and they work fine from the PC after that. Very odd.