Sessions live as long as their clearance actually does
Auto used to ratchet a host's session TTL downward on every replay failure, even when the failure didn't reflect a real cookie expiry. Sessions kept getting evicted and re-solved while their cookies still worked. The TTL now grows on aged successes and only retreats on real expirations, so a learned session for a Cloudflare-cleared host can carry across several minutes instead of dying after the first 403.