When opening a RAW file in Affinity Photo the first time you start the app sometimes you get a distorted rectangle in the corner. This does not go away and is also saved. Closing the photo and importing it again solves the issue. See screenshot.
Apple RAW
Ipad pro 11 2021 128gb IOS 15.7
Affinity 1.10.5.280
See image attached, in the bottom left corner when I open a RAW image (Nikon D800 .nef), there's a square/block that's just a re-rendered copy from another part of the image. It goes away when I close the image and open it again and only happens for the first image I open during an editing session.