A connection can end after logout, removal of the linked device, or a connection failure. A Console status alone does not tell you which of those happened. A paid number can also be prevented from restarting by a funding or team-access problem.
Check the number's status and error, then inspect the linked-device entry in WhatsApp if you control the phone. Reconnect only after understanding whether a new pairing is required. If it repeatedly goes offline, report the times, last successful action, and any WhatsApp warning. Avoid deleting the number or repeatedly relinking it before support reviews the evidence.