system adds \ when typing wildcards

Hello, friends.

Could you explain me why system automatically adds \ character when adding wildcard character * and how to avoid it. For example I would like to search for results which ends with 5 and type *5 but the system automatically adds \ and result is \*5 (example image added). The result is that lookup just doesnt find any results at all. So I need to manually delete \ and then it finds them.

Best regards,