The workflow is set to " Any approver can approve a request, provided the others do not reject" and " Automatically trigger tasks once Service Request got Approved."

But a technician can pick up or be assigned the request while the request is still in Pending Approval status. They can even close the task and resolve the request.

Ideally I would like the request to not be visible and/or not be assignable while it is "Pending Approval". A bug or am I missing something?