Weird search issue

I noticed a strange behavior in my site:

1. I try to search with a keyword. No result.
2. I try to search with a keyword and a location. No result (maybe because no events have locations in my test environment…)
3. I try to search again only with a keyword. It works fine.

I don’t see any error besides “jquery-1.10.2.min.map 404 (Not Found)” (but jQuery is indeed working on that page)

https://www.ads-software.com/plugins/events-manager/