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/662b5874c978d843d2e31134681da1832162c1d4/spec/fixtures/files/mini-static.gif)