When I assign or unassign a Placeholder, or unassign a User from an action card with subactions, I am prompted as to whether or not I would like to assign/unassign that Placeholder/User to the subactions as well. This is the desired functionality, as it gives the user choice.
However, when I assign a User to a card, Hive automatically assigns the User to all subactions, without prompting. In the cases where I did not want this, I must then individually unassign the User from each subaction.
Please prompt during a User-Assign as well, like you do in every other case (User-Unassign, Placeholder-Assign, Placeholder-Unassign).