Hi Leo,
You’re right. This maybe one of plugin forces to resize the image smaller than the container. However, I uploaded a new image with size larger than the container and the issue is still there. The left and right of image fit to container but the top of image still has a padding above. Could you fix this without affect the layout of other pages?
ps: Autoptimize turn-off. You can view the link of this post that included a new image.
Thanks