This controls whether the node automatically reverts back to its preferred, higher-priority synchronization reference once that reference recovers after a failure. Disabling it is a deliberate operational choice that prevents the switch from switching clock references again during a flapping reference, which would otherwise regenerate slips or momentary hits every time the flapping feed briefly comes back. For example, a tech sets nodeSyncAutoRestore to disable(2) while troubleshooting an intermittent BITS feed so the node stays on the stable secondary reference instead of bouncing back and forth.