Blank Pages after full page illustrations

Hi all, I have an issue with blank pages after full pages illustrations. The illustrations are 1920x2560 JPGs at 300 dpi. They are of type ‘Chapter’ so I am sure the page includes a section break. When I compile as an ebook it looks great on Apple Books on a Mac but if I expand the window size on the screen, at certain sizes a blank extra page appears after the illustration page. It just depends on the size of window you drag. It almost like a rounding error is creeping in when the window decides if the picture fits on one page or the other.

Thanks for any suggestion

I believe that is an option in the compile panel for mac.
Can’t tell you where tho, I’m running a PC.