Try clearing your browser cache or doing a hard refresh to start with and see if that changes anything, it could just be the cache not loading the image properly (hard refresh is ctrl+F5 on Windows PCs), and usually clearing your cache will allow it to load up normally.
If that doesn't fix it, I'd see if temporarily disabling your adblock (if you have one) does anything, maybe its inadvertently blocking those images. If you have any other browser extensions/plugins that might be blocking elements I'd check those too.
If you are still having trouble with it after trying those, I'd suggest sending in a
help ticket, and we can try some more in depth troubleshooting.
