Looks like copied tempfile need to be flushed before further processing. This issue won't happen if the uploaded file has enough file size.
1.2 KiB
32x32px
1.2 KiB
32x32px
![](/asonix/mastodon/raw/commit/c373148b3d43056c242fbb891510f1f841ca2f45/spec/fixtures/files/mini-static.gif)