Using catz (catalog zones): BIND does not remove the catz-journal file on the slave

[Tom]

Hi

Using BIND-9.16.19: When removing a member zone from a catz (catalog 
zone), then the journal files are not removed on the slave:

Current situation before removing the zone "example.com" from catz:

$ ls -lahF
-rw-r--r--. 1 named named 4.0K 28. Jul 15:21 
__catz___default_catalog.123456.local_example.com.db
-rw-r--r--. 1 named named 1.2K 28. Jul 15:26 
__catz___default_catalog.123456.local_example.com.db.jnl


After removing the zone on the master (catz), the slave removes the 
__catz___default_...-files for the corresponding zone, but not the 
journal-file:

28-Jul-2021 15:29:56.018 general: info: catz: updating catalog zone 
'catalog.123456.local' with serial 2021072803
28-Jul-2021 15:29:56.018 xfer-in: info: zone catalog.123456.local/IN: 
transferred serial 2021072803: TSIG 'master-slave'
28-Jul-2021 15:29:56.018 xfer-in: info: transfer of 
'catalog.123456.local/IN' from 172.16.1.1#53: Transfer status: success
28-Jul-2021 15:29:56.018 xfer-in: info: transfer of 
'catalog.123546.local/IN' from 172.16.1.1#53: Transfer completed: 1 
messages, 5 records, 343 bytes, 0.001 secs (343000 bytes/sec) (serial 
2021072803)
28-Jul-2021 15:29:56.020 general: info: catz: deleting zone 
'example.com' from catalog 'catalog.123456.local' - success
28-Jul-2021 15:29:56.021 general: warning: catz: 
catz_delzone_taskaction: zone 'example.com' deleted

$ ls -lahF
-rw-r--r--. 1 named named 1.2K 28. Jul 15:26 
__catz___default_catalog.123456.local_example.com.db.jnl

Is this intentional or possibly a bug?

Many thanks.
Kind regards,
Tom