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
![](/dark-firepit/mastodon/raw/commit/2dee293c4c98486d387105224023fad02b8b0d96/spec/fixtures/files/mini-static.gif)