figure out why `Consumer sequence` > `Stream sequence`

[vigith]

Even with Redelivered Messages: 0, why are we seeing the difference?

https://docs.nats.io/running-a-nats-service/nats_admin/jetstream_admin/consumers#stream-vs-consumer-sequence-numbers

Configuration:

                    Name: oss-analytics-xxx-usw2-prd-fci-blackhole-pipeline-2-blackhole-sink-1
               Pull Mode: true
          Filter Subject: oss-analytics-xxx-usw2-prd-fci-blackhole-pipeline-2-blackhole-sink-1
          Deliver Policy: All
              Ack Policy: Explicit
                Ack Wait: 1m0s
           Replay Policy: Instant
         Max Ack Pending: 25,000
       Max Waiting Pulls: 512

Cluster Information:

                    Name: default
                  Leader: isbsvc-default-js-1
                 Replica: isbsvc-default-js-0, current, seen 4ms ago
                 Replica: isbsvc-default-js-4, current, seen 4ms ago

State:

  Last Delivered Message: Consumer sequence: 36,874,712 Stream sequence: 36,874,472 Last delivery: 6ms ago
    Acknowledgment Floor: Consumer sequence: 36,874,712 Stream sequence: 36,874,472 Last Ack: 585µs ago
        Outstanding Acks: 0 out of maximum 25,000
    Redelivered Messages: 0
    Unprocessed Messages: 92
           Waiting Pulls: 0 of maximum 512