present or subjunctive

In the sentence "the tradition wants that it be always the same person who handles the teapot" (where "be" is a subjunctive), I was wondering if "handles" should not be replaced by the subjunctive "handle" too.

The verb in the relative clause (who handles) is unaffected by the verb in the main clause, wants, or be in it be. The verb could be an infinitive "...that it be the same person to handle the tea pot" or a participle "...that it be the same person handling ..." or simple present "...that it be the same person who handles the teapot." That verb is part of a phrase modifying person.

P.S. You might also find a modal:

"...that it be the same person who should handle the teapot."