I use the Power Search plugin. I asked on their forum and I don’t I had a reply.

If I type 10/19 as the search term I get a 404 result.

[@ajtruckle Participant 3 years, 11 months ago]

Please see this discussion:

https://wordpress.org/support/topic/searching-for-terms-like-10-19/

Turns out this is a bug in bbPress. My main website search engine is fine. Just the bbPress tool failing.

Can a ticket be raise?