Tealium Learning Center

In my understanding, the utag_main_v_id(tealium_visitor_id) shoud be unique for the same visitor in same device not change, but my utag_main_v_id is different every time I visit the page, I promise I never close my browser, never clear my cookie, I do the refresh action in the same browser, and in the same window pc, so it is really weird, any exports here can help me, thanks in advance! ... View more