I would like to verify this bug. I am working on a pixel art project and I've used many different raster art editing tools without ever seeing this issue. If you COPY pixels then PASTE them they become blurry, as if a filter is being added to them. In the example below I've copied a 64x64 block of pixels at 72dpi and pasted them into a 64x64 72dpi image and it has been blurred. This does not occur in other software, like the FREE editor GIMP. This makes Affinity Photo a horrible tool for artists, especially game artists as we need complete control over every pixel.
This is frustrating as it looks like I should have stuck with GIMP rather than re-purchasing Affinity Photo for Mac. The response that the VECTOR tool Affinity Designer is the tool for RASTER PIXEL ART is disheartening. I own Photo and Designer on Windows and grudgingly re-purchased Photo for MAC, just to discover I should have downloaded the free tool GIMP instead.