Query returns only one result, clicking "Show more" shows MANY more, why?

Created by: slimsag

1. Start a Sourcegraph instance using 3.11.2.
2. Add all public GitHub.com repositories under the user:Andoryuuta
3. With regex toggled on, search for MHF_.+, only one result is returned.
4. Click Show more and MANY more are returned. This is weird because it makes it look like we don't have all of the results.