Hey @bally , it is not clear to me from the screenshot if the output of the node (which by the way comes from Google) states that the new group was applied or that response also show the group is missing?
The node has a green tick and returns the json above. So I don’t know what it means but I assume it thinks it applied the group.
Unfortunately the returns the group id as a number and not as a name so I can’t really say whether it is what I said but it’s a new contact so I should not have any group membership at all before this point.