Could be related to the image color profile. Noticed the same issue when I uploaded a jpeg image with a CMYK color profile, with RGB images it worked normally.

Could be related to the image color profile. Noticed the same issue when I uploaded a jpeg image with a CMYK color profile, with RGB images it worked normally. I've had the same trouble when using Java's ImageIO to read images. There were some workarounds, but I didn't find a robust one. Ended up using a preprocessor to normalize images before reading them with Java. Would love to know if someone knows a better solution.