Almost every operation has said it at some point. It's probably on a poster in the break room. It gets implied in the Monday meeting, in the safety huddle, in the onboarding package. We're like a family here.
In nearly 30 years of working with industrial companies, almost every single one has admitted the same thing. They have a communications problem, a departmental silo problem, or heaven help them, both.
You gave them the title. You gave them the schedule, the paperwork, and the HR contact number. But there is one thing most organizations never give their supervisors when they promote them. And it is the only thing that actually matters.