Steps to reproduce

1. Create any component for on any page
2. Add variant for the component
3. Set audience for this component
4. Add Visitor trait and choose "Returning"
5. Navigate tho the page and see results
6. Notice that component variant for "Returning" visitor is never shown

Expected results

Returning visitors should be determined by the Visitor trait.

Actual results

Returning visitors are not identified by the Visitor trait.

Workaround

Disable NEW_VISITOR cookie in the Cookies app.

Development notes

It happens because of the logic inside the
info.magnolia.personalization.visitor.VisitorDetectorFilter java class. It sets NEW_VISITOR cookie, it is never removed, but visitor status is determined by this line 

Visitor.Status status = (!newVisitorCookie.isPresent() && visitorCookie.isPresent() && Visitor.RETURNING.equals(visitorCookie.get().getValue())) ? Visitor.Status.RETURNING : Visitor.Status.NEW;

where newVisitorCookie.isPresent() is always true. As result the visitor's status is always NEW.