My game, spindle of serendipity, seems to have vanished from Search, as seen here.

I read the docs, and I don't see anything major that could have caused this. It was shown before. Does pushing updates for a game too often get your game flagged and un-indexed? I ended up pushing via butler about 6-7 times over the course of a day or two while trying to figure out GitLab CI/CD a couple weeks ago. I do see a bit about "Creating spammy pages."

Please contact support and ask. They can look behind the scenes and tell you more exactly.

It seems to be visible again.

Not sure if that's the issue you had, but my project disappeared from search once when I deleted the game file in "edit game". And that was before I clicked "save".

Whenever I update a project I always make sure the updated file is uploaded to itch before I remove the old one. Basically I have to ensure there is a downloadable file or the game won't be listed in search.

I've been using butler to push builds to the same channels.