The winner of this bounty will be the first comment that solves this issue I'm having using img2img in a1111.
I began my session playing in text2img - created an image of a snowy forest and wanted to take it to img2img to make it more black and white, this was successful the image became completely black and white.
played around some more with it and now I want to add some color back into it... So i go to my prompt folder and pick one I know adds a nice color palette into the image..
here's where it gets weird..
when the image is generating and you see it forming the steps of the image, I see it adding color to it and it seems like it would finish as a colored image, but right at the end as it goes from 99% to 100% it goes completely black and white.
I tried adding negative prompts to exclude black and white, i tried increasing the denoising, I tried restarting the program.. so far it keeps producing only black and white images.....
what's going on?
example below that it starts to add color to it, but finishes without color.