Uploading GIFs on this site has been hit-or-miss for the few months I’ve been here, but where they used to fail with an error page a while back, the GIF is now quietly discarded from the thread. Posting GIFs to this instance is broken from kbin.social as well (where the whole post fails) so it’s not a front-end issue.
thanks - I wasn’t aware of the issue. I will try to figure out why.