A service provider running Segment Routing over IS-IS observes brief traffic loss after a core link fails, even though TI-LFA is configured and provides a valid backup path. Packet captures show transient forwarding loops occurring a few hundred milliseconds after the failure, once IGP reconvergence completes and the PLR reverts from the backup path to the new primary path. Which feature should be enabled to eliminate these transient loops during the convergence transition?