I use contact API via forms to send new leads to Hubspot (I send the hubspot cookie by API)
I can see views and clicks through statistics but not the forms submissions...
Sorry about that, looks like this slipped under my radar. After looking at that contact, it appears the form is correctly sending the hubspotutk value, so analytics data should be populating correctly. I'm not entirely clear on what's wrong here, so I'll have to continue doing some more testing. I'll reach back out here when I have some more info on this issue.
Just to make sure that we're on the same page, you're seeing all correct analytics data, but there are form submissions that the contact has made that are not appearing on the contact's timeline? Can you send me a link to a contact in HubSpot that demonstrates this so that I can take a closer look?