A position being vacant for 8 months suggests inefficiencies in the hiring process or an inability to make decisions. This can be a red flag indicating deeper organizational issues. Given the circumstances, it may indeed be necessary for the CHRO to step in. A senior HR leader can provide the necessary guidance, clarify the role, and streamline the hiring process.
The hiring manager exhibits control issues, this can create a toxic work environment and hinder collaboration and innovation. It might also explain the prolonged vacancy if the manager is overly critical or unable to make decisions.