@pixel Well, if Sidekiq had a long queue jobs to process on your server, that could explain it.

Meaning, if you were processing more federation and other jobs than what your hosting plan could handle immediately and a queue was formed.

You can check the Sidekiq activity inside Mastodon via the browser (Administration->Sidekiq). If the number under Enqueued is above zero, then there is a queue.

But let me know if the issue comes back and I can look into that for you.