Stape.io Data Layer item_id is different than Merchant Value

Been testing Stape in 6 of my shops, but The Data Layer pushed by Stape is not the same as to the one available in Merchant, but only in “purchase” not in “view iteM”
Stape dont offer any support on this problem.

Other than that i think stape works good but i need google ads to be able tp track this as well, anybody have any idea or another server-side tracking i can test?