OC 2.2.0 changes image when uploaded > terrible quality

So I have been running an OC 2.2.0 shop for some years, worked fine for me. And have been adding new products over the last couple of days in the same way as I have always done. However, when I looked at the product page I noticed a lot (not all) of the images where looking really bad (see below). The original images are looking great, but when opencart has put them in its cache and shows them, the (I think) white balance has completely changed! Below is an example, the first is the original image, the second the "opencart" image.

I made no changes to my shop, so I can only think it has to do something with the way the images have been coded (which also explains why not all images seem affected as well).

Doe any of you have a clue what happened?

Found the solution! Apparently, some images were not coded as sRGB which then results in the above.
So easy fix!