Featured Image not cropping

I have selected the featured section to display the featured image, but when I choose to crop it to 400px it will not display. I haven’t had this issue when I have tried it on other pages but for some reason all those whose parent page is “Study” are having this issue.

Here is a page showing the image because I do not have it cropped:

http://y2yoga.com/study/core-strength-inversions-workshop-with-beach-yoga-girl/

And here is one where it is not because I do:

http://y2yoga.com/study/astrology-series-with-blake/