This exact same thing was happening to me last night in Affinity Designer iPad. I used “place image” from photos app and drag from upper left down to the right. Not all images had this problem. I tried different methods: Place image and dragging down from top left or right caused the image to come in upside down. Dragging up from bottom left or right caused the image to be right side up. Place image and clicking and the image came in upside down. The problem images I think may have all been selfies (can’t recall for sure). Possible they were taken with the camera “upside down” and Photos automatically displays them in the correct orientation??? I have attached the problem image.