Status: IN
The membership subsystem is unreliable at two independent levels that interact destructively: failure detection is both the single correctness bottleneck AND permanently miscalibrated (no arrival-rate history for adaptive thresholds), while membership and data convergence operate at fundamentally different rates (O(log N) membership gossip vs O(N) data propagation in ring topology), meaning incorrect liveness decisions propagate through membership faster than data can adjust to them.