Maybe I have messed with a setting somewhere but, Affinity seems to lose the top margin when I print. I set it at , say, 15mm and it starts the page about 13mm higher (on A4 paper).
Thus my drawing has to be shifted down about 13mm to come out truly as intended.
I had not noticed this before so maybe it has come in after last upgrade. If I export the whole page as pdf and then print margins are correct!
See file Test page and Print Preview Grab.
Affinity Print Problem.tiff