Events list search doesnt search

Hello!
When I activate search for events page, it behaves strange, seems like it fires out before results come (hard even to explain)
What I changed:
1. Events page formatting in admin=>events=>settings=>formatting (just added my own html with plugin placeholders)
2. Chose another page for events (Events Calendar instead default Events)

Also I deactivated all plugins which were connected with search.
Here is a test site Test site

I read all possible themes on plugin forum and can’t figure out what the reason can be that search doesnt work.
Search on /events-calendar/locations/ works perfect.