Wordpress Search posts always returns 0 bundles

I have a Wordpress search post on a custom post type. Then a Router: if no bundles found, create a post, otherwise update the post.
The search argument definitely is in the title, but it always returns 0 bundles. And next it keeps on creating new posts, all with same title and slugs with …-6 (and counting).

Í’m confused. Has anyone noticed the same or very similar? Any advise?