PNG files get unlinked and become all yellow/negative

[Boris5D8F]

I am making some catalogue and when I import files all is fine. PNG files with removed white background (classic product images). While I am working everything is ok, but when I shut down Illustrator and computer, after I start working again the images are all yellow and looking like something like a film negative. PNG images are 8bit , exported from Photoshop. 

Now I have to relink them one by one which is not the thing I want to do since there is a lot of images.
Anybody had this problem and is there a solution for preventing this?
Image is attached.

Thanks!

[Ton Frederiks · Accepted solution]

This is a known problem, see Anshul Sainis answer here:

https://community.adobe.com/t5/illustrator-discussions/pngs-linked-in-show-up-in-purple-white-with-y...

[Boris5D8F]

Thank you!