natscli: JSON configuration generated cannot be consumed

When adding a Pull Consumer to a given stream through NATS CLI, I end up by exporting the JSON configuration running nats consumer info --json for convenience of later configurations. When consuming that configuration, using the same CLI version, I get the following error:

nats: error: Consumer creation failed: consumer in pull mode requires explicit ack policy (0)

The command I execute is nats consumer add --config=/configs/some_config.json and I’m prompted to select the stream.

The following is the consumer configuration process:

docker-desktop:~# nats consumer add SOME-STREAM-NAME SOME-SUBJECT-NAME ? Delivery target (empty for Pull Consumers) SOME-SUBJECT-NAME.SOME-STREAM-NAME ? Delivery Queue Group ? Start policy (all, new, last, subject, 1h, msg sequence) all ? Acknowledgement policy [Use arrows to move, type to filter, ? for more help] ? Acknowledgement policy explicit ? Replay policy instant ? Maximum Allowed Deliveries -1 ? Maximum Acknowledgements Pending 1 ? Idle Heartbeat 30s ? Enable Flow Control, ie --flow-control Yes ? Deliver headers only without bodies No ? Add a Retry Backoff Policy Yes ? Backoff policy linear ? Minimum retry time 5s ? Maximum retry time 10s ? Number of steps to generate in the policy 5 Information for Consumer SOME-STREAM-NAME > SOME-SUBJECT-NAME created 2023-02-05T23:19:49Z

Configuration:

    Durable Name: SOME-SUBJECT-NAME
Delivery Subject: SOME-SUBJECT-NAME.SOME-STREAM-NAME
  Deliver Policy: All
      Ack Policy: Explicit
        Ack Wait: 30s
   Replay Policy: Instant

Maximum Deliveries: 6 Max Ack Pending: 1 Idle Heartbeat: 30.00s Flow Control: true

State:

Last Delivered Message: Consumer sequence: 0 Stream sequence: 0 Acknowledgment floor: Consumer sequence: 0 Stream sequence: 0 Outstanding Acks: 0 out of maximum 1 Redelivered Messages: 0 Unprocessed Messages: 0 Active Interest: No interest

The generated configuration is the following:

{
  "stream_name": "SOME-STREAM-NAME",
  "name": "SOME-SUBJECT-NAME",
  "config": {
    "ack_policy": "explicit",
    "ack_wait": 30000000000,
    "deliver_policy": "all",
    "deliver_subject": "SOME-SUBJECT-NAME.SOME-STREAM-NAME",
    "durable_name": "SOME-SUBJECT-NAME",
    "flow_control": true,
    "idle_heartbeat": 30000000000,
    "max_ack_pending": 1,
    "max_deliver": 6,
    "replay_policy": "instant",
    "num_replicas": 0
  },
  "created": "2023-02-05T23:19:49.984678331Z",
  "delivered": {
    "consumer_seq": 0,
    "stream_seq": 0
  },
  "ack_floor": {
    "consumer_seq": 0,
    "stream_seq": 0
  },
  "num_ack_pending": 0,
  "num_redelivered": 0,
  "num_waiting": 0,
  "num_pending": 0,
  "cluster": {
    "leader": "NBYPYKCAVIO2RVGDPAF34ECT5DGYPHJMH3YPKEEI6LIKUPD37G2WOZKU"
  }
}

Anyone getting the same behaviour? Am I doing anything wrong?