Notice the big change in this release, when using a pixel based document, 100% view will map to 100% of physical pixels, rather than 100% of logical pixels (based on your Windows Display Scale).
Bug or not, the problem of not being able to quickly and easily toggle to a 1:1 view as I can with every other editor I use makes Affinity Photo a nonstarter for me.
The program also appears to ignore the compatibility option to "Disable display scaling on high DPI settings", so this can't be worked around by accepting a tiny interface to get proper image display.
markp got a reaction from adiksw in [Multi] Zoom Value Adjusted for Windows scaling