Inverted photos when exporting PDF

[chelseam47575566]

Hi! I have been having a recent issue with my illustrator since updating it when I go to export a PDF. I never had this issue before. 

When I place an image and convert the image to Grayscale and then click a color to colorize that image, in Illustrator it looks fine (see below. the darks and dark and highlights are light).

but when I go to export as a PDF (there is "no color conversion") I get this inverted type of error.

All the colors that I have chosen are not spot colors and I have tried different colors too and it has still been interacting like this when I export. Any help?

[Mohammad.Harb]

Did you convert the image to grayscale in Photoshop or illustrator? 

It is always better to edit images in photoshop  then place them in illustartor 

[chelseam47575566]

I converted it in illustrator! 

[Ton Frederiks]

I can repeat that behaviour in 2020 and 2019.

But it works fine in an older 2017.

You can report it here:

https://illustrator.uservoice.com