I have a lookup field in creator that integrates with contacts module.

When I'm searching for certain names of contacts, it doesn't find these contacts by their full name. If I search only for some words of the last name i can find them, but not always. It also seems to be random, some contacts I can search by their full names, others I can't. And they are saved in CRM just like those I can't find.

Seems like a bug to me. How can I get this fixed?