How do I exclude a PR from search based on a portion of its title?

[jcollum-nutrien]

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I want to exclude any PR that starts with "fix":

Started with: is:pr is:open review:required draft:no -in:title "fix"

This is the result:

Clearly that doesn't work. But the docs say that you can filter out search terms using a minus. If I search using in:title "fix" I get 5 PRs that all start with fix. This looks like a bug but maybe I'm misreading the docs. I tried using the author filter as well, with worse results.

I asked on SO if anyone wants some karma there: https://stackoverflow.com/questions/78663653/how-do-i-exclude-a-pr-from-search-based-on-its-title