Weird printing problem: horizontal offset wrong in zoom to fill preview

I took some photos today and imported them as Canon CR3-files. Cropped them and then decided to print them with another aspect ratio: I choosed "zoom to fill" in the printing module. Then I adjusted the horizontal offset by moving the image until it looked OK. But I noticed that the mouse action in the horizontal direction was reversed (when clicked on the image and moved the mouse to the right, the image moved to the left).

And when I printed the image the horizontal offset in the frame wasn't correct. I could correct it by trial and error while printing to jpeg som I managed to get a corret print. 

I don't have this problem with other files, the first photos I took today behave correctly. And I took some photos after wards that also behave correctly. What might have happened here??