I just installed Affinity Publisher (10 day trial) on my windows 10 computer.
When loading black and white images (jpg) into a document, they are displayed with a strong sepia tone. This is indepenend from the chosen color mode (RGB, CMYK, grayscale).
Also the color panel on the right side is sepia. (see attachment)
When exporting to pdf the resulting fine in some cases b&w sometimes also sepia (could not figure out what caused the different outcomes).
Interestingly, I also installed Affinity Designer (test version) and had the same issue.
Thanks for your help!