I've updated gravatar image and successfully refreshed it in preferences, but only once. Now it doesn't update more, I press refresh but nothing happens. For example forum.syncthing.net that also runs discourse successfully refresh it multiple times.
Looks like it's some rate limiting on the forum.openwrt.org site, but the last successful refresh was about a day ago.
I've uploaded a new image with green eyes for clarity.
F-Droid's dircourse updated it asuccessfully, while pressing update on this discourse does nothing: