On Stack Overflow I have a profile photo, but on all other Stack Exchange sites, my photo has been replaced with an automatically generated avatar.
I tried going to https://stackoverflow.com/users/edit/161801 and clicking "save and copy changes to all public communities", but it doesn't seem to have any effect. I have no idea when this happened as I don't visit this site very often and it's not something I would necessarily notice, but I am pretty sure it didn't always used to be this way.