Plesk is configured with Slave DNS servers (via Slave DNS extension or any custom integration).
Disabling DNS service for a domain in Domains > example.com > DNS Settings > Disable does not trigger slave DNS zone update to delete the zone.
As a result, the following errors appear in
/var/log/syslog on a slave server side:
CONFIG_TEXT: named: transfer of 'example.com/IN' from 203.0.113.2#53: failed while receiving responses: REFUSED
Plesk bug #PPPM-7931, which will be fixed in future product updates.
Until the fix became available, delete zones on slave servers manually.