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The fallback_ips tasks are essentially serializing the gathering of one fact on all the hosts, which can have dramatic performance implications on large clusters (several minutes). This is essentially a reversal of 35f248dff0ddb430e2293af98ba73aa5062c89c1 Being able to run without refreshing the cache facts is not worth it. We keep fallback_ip for now, simply changing the access to a normal hostvars variable instead of a custom dictionnary.