Unhide button on first post does nothing after flag + edit sequence

Hi, I ran into an unusual issue on my site where the Unhide button on the first post simply does nothing, with no error and no log entry.

What happened

  1. A user created a topic.
  2. The first post contained a keyword from my Watched Words (Flag) list.
  3. I manually reviewed the flag and chose the “Hide Post” option.
  4. Later, a moderator edited the post and tried to make the topic public again.
  5. The topic itself became visible, but the first post remained hidden.
  6. When I click Unhide on the first post, nothing happens — the post remains hidden.

Additional notes

  • The post had hidden_reason_id = 1.
  • I tried to reproduce the same sequence again (Watched Word → Auto-flag → Agree → Edit), but I cannot reproduce the bug anymore.

I’m quite confused about why this happened — it really seems like a bug.
Is there still any way to rescue this post, or is it permanently stuck in this hidden state?

Thanks!

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