This worked for me - if you select the image block that is zooming and set a fixed height, the image doesn't change as you expand the accordion. The whitespace of the section still expands below the accordion but it doesn't look nearly as bad as the image zoom!
It will prevent dynamic image sizing for responsiveness, so be sure to use media queries to change the height of the image in mobile / tablet if needed.
#block-71dg10454aa196265419 {
height: 700px; /*experiment with correct height here*/
}