Error Parsing replication_delay

[git-user-apgtm]

Hello,
Issue trying Docker stack with image:
pgpool/pgpool2_exporter@sha256:6748aff469abaa6f5aa150da7f70f1853eb9bf6250e78ab780fa5e8429f2f860

following error is logged:

2025-01-03T16:04:08.503595652Z [email protected]    | ts=2025-01-03T16:04:08.503Z caller=pgpool2_exporter.go:715 level=info msg="error parsing" err="Unexpected error parsing column:  pool_nodes replication_delay [48 46 48 48 48 53 54 56 32 115 101 99 111 110 100]\n"

Pgpool is v4.5.5.
Output from 'show pool_nodes;':

-[ RECORD 1 ]----------+--------------------
node_id                | 0
hostname               | db1
port                   | 5445
status                 | up
pg_status              | up
lb_weight              | 0.142857
role                   | primary
pg_role                | primary
select_cnt             | 429328
load_balance_node      | false
replication_delay      | 0
replication_state      | 
replication_sync_state | 
last_status_change     | 2025-01-01 01:22:03
-[ RECORD 2 ]----------+--------------------
node_id                | 1
hostname               | db2
port                   | 5445
status                 | up
pg_status              | up
lb_weight              | 0.857143
role                   | standby
pg_role                | standby
select_cnt             | 3196857
load_balance_node      | true
replication_delay      | 0.000631 second
replication_state      | streaming
replication_sync_state | async
last_status_change     | 2025-01-01 01:22:03

Am I missing something in pgpool or Postgres configuration?

Thanks.