The issue is that Avatar Flair Images are being pulled directly from the upload bucket instead of the S3 CDN. dschaper has tried to update the domains to use the S3 CDN, but was unsuccessful. The issue was reproducible on Meta by Falco. dschaper suspects that a variable may be set incorrectly, but Falco has found a solution in the form of a pull request (#12130). The fix has been confirmed to be working by dschaper.
We’ve recently moved our file storage over to S3 using the wiki posted here on meta. Everything* looks like it’s now being pulled via our two CDNs. (One for static files and one for uploads as suggested in the wiki guide.)
We have images for two user group Avatar Flair Images and they are now being pulled directly from the upload bucket instead of from the S3 CDN like the other images. I don’t know what rails commands need to be run to update those domains to be the S3 CDN instead of the bucket directly.