Issue with mk_oracle rman check (DB_INCR) - does not report all level 0 backups

Troubleshooting
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1

mk_oracle version: 2.1.0p38

I am using mk_oracle to monitor 30+ Oracle databases. All have the same setup (Linux, x86_64, Oracle 19c).
On one of the databases I have an issue with the DB_INCR_0 RMAN Backup check.
It can only find a very old level 0 backup. However, I have verified with the following script (and of course from logs in the backup system) that the level 0 backups are running every week:

SELECT 
    BS.RECID,
    BS.STAMP,
    BS.SET_STAMP,
    BS.SET_COUNT,
    BS.BACKUP_TYPE,
    MAX(BP.COMPLETION_TIME) AS COMPLETION_TIME
FROM 
    V$BACKUP_SET BS
JOIN 
    V$BACKUP_PIECE BP ON BS.SET_STAMP = BP.SET_STAMP AND BS.SET_COUNT = BP.SET_COUNT
WHERE 
    BS.BACKUP_TYPE = 'I' AND BS.INCREMENTAL_LEVEL = 0
GROUP BY 
    BS.RECID, BS.STAMP, BS.SET_STAMP, BS.SET_COUNT, BS.BACKUP_TYPE
ORDER BY 
    COMPLETION_TIME DESC
FETCH FIRST 1 ROW ONLY;

Output from the query:

     RECID      STAMP  SET_STAMP  SET_COUNT B COMPLETIO
---------- ---------- ---------- ---------- - ---------
   3425638 1166803237 1166803235    3591488 I 20-APR-24

However – mk_oracle can only find this:
ORADBNAME|COMPLETED|2024-01-13_03:48:25|2024-01-13_03:48:25|DB_INCR|0|147406|0

I’ve ran the “check_mk rman1” SQL command and have verified that this is the only level 0 backup it selects, but it does show a lot of level 1 backups (and the monitoring of those is working as expected).

Has anyone seen a similar issue with mk_oracle?

Bgrds,
Finnur