published course has a different height than in authoring mode

cpliu Community Member Posts: 237
I'm on v11 and I set my course dimension to 980 x 1500 (height). A user would scroll to see all questions. I aligned my survey questions based on the height and place the submit button close to the bottom edge. It looks fine in authoring mode, but the published one actually has the height of ~ 1700 than there is a lot of extra space below the button. The width is at the exactly I specified. My view is zoomed at 100%.

After testing a few different height before publishing, it appears the published ones have the same height (extra 200pixels) no matter what height I set on the course.

Anyway to fix this?