iPad images seem to be displaying differently than on PC, leading to drag and drop positions not being correct

A teacher complained that her games play well on PC, but on iPad, the positions change. Her example lesson is https://jigzi.org/asset/play/jig/5a522e18-913b-11ee-8a95-37486f6926c0?direction=ltr&display_score=false&track_assessments=false&drag_assist=false&is_student=false&draft_or_live=live

I have looked at the JIG, and it seems that on the PC, the background image is not full width, but on iPad it is being displayed as full width, thus changing the relative location of the answers.

EG, screen 3. on PC see the letters on top of the wheat sheaves: (notice that the image does not go to the edge of the PC.

BUT on iPad, , the image is shown full width, and the letters are not on the sheaves:

Screen 4: On PC, the letters get placed ON the stars (also, background not full width). On iPad, letters don't get placed on the stars, but slightly above: IN FACT ON IPAD, YOU DON'T EVEN SEE JOSEPH AT THE BOTTOM OF THE SCREEN!

And on screen 5, which is listen and learn, the background on PC is not full width and shows the feet of the actors. On iPad, don't see their feet.