How to send out notification to the task owner who is not initiator when combined notification activ

Summary:

We have enabled combined task notifications for our journeys beacuse we don not want to send notifications for individual tasks. For most of the tasks, the initiator (recruiter) is the owner however, for one specific task related to payroll, the Payroll rep has been made the owner so that they can get notifications once the payroll related details are completed. But, only the initiator is getting notifications , not the payroll rep. How can this be achieved with combine task notifications enabled?

Content (required):

Notification to task owner when the combine task owner notification is enabled.

Version (include the version you are using, if applicable):