I noticed some oddities when looking for a contact by user token.
A week ago, when I visited my site, I saw hubspotutk = "some_user_token" in the cookies.
I made a contact request by user token and got the contact IDs (canonical-vid, vid and is-contact = true) from Hubspot.
This was correct contact.
Today I went back to the site. In my cookies, I still have the same user-token (hubspotutk).
I again make a contact request and get another contact ID (another canonical-vid and vid and is-contact = false).
And this contact is not yet in HubSpot
This is a problem. I'm trying to identify visitors by their user token (because I have no other way).
Every day the user token of the visitor does not change, but result search for contacts by user token every day gives out new contact IDs.
You can tell how I can reliably identify the visitor?