I am having the exact same issue.
Yeah, I’ve never had a problem with the WordPress SEO plugin and have run it on many many sites without issue.
Timely did come back and say that if there was a suggested fix, they would be happy to implement it, for what its worth . . .
Not sure if you’ve solved this or not. Try removing “echo” from in front of just_custom_image.
So it would be:
<?php just_custom_image($post->ID, 'award-image'); ?>