[BUG] when I search for 'fed' everything is fine, but once I search for 'fedi' or 'fediverse' or 'fediversenews' I get a 500

I saw other reports in the recent call for problems of errors around searching, but this seems, to me at least, to be reproducible.

edit: to be clear, this is using fedia.io - I am not sure if this bug affects mbin/kbin more generally, I've only tested on fedia.io.