For some reason I cannot get user jmoore (a superadmin) gravatar to show up on his blogs. He does have one set in gravatar. We've even went and changed it a set a different photo to see if that would fix it, but his pic still does not show up for some reason. His Avatar does show up on stuff such as by his blog on the archive page. My site appears to pull two images (gravatar and avatar) depending on the location of particular one and his Gravatar is the only one there seems to be an issue with. Here is one of his blogs for example. https://myreadyroom.com/how-to-pick-a-technique/
BTW: I have granted support access on our site if that helps.