A week or so ago, I disabled and uninstalled the Search plug-in shipped by @manton in favor of the Search Space by @sod. I also, set up a redirect from /search → /search-space. Weirdly, though, jb.heydingus.net/search (link) still loads the old Search interface. I thought, given a fews days, it would figure itself out, but so far it has not.
That did the trick, thank you!