I encounter image problem again. I did Force Regenerate Thumbnail with the size of 100×100, and those images are shown correctly.
But the new images that I upload today are not shown as 100×100 thumbnail size on mobile. See screenshot: http://prntscr.com/9py1mv I did set 100×100 on Genesis Theme Setting.
What could be the problem? Do I need to set the size on functions.php file as well?