Additional ACL actions of series are missing when creating a new event in that series

Steps to reproduce:
1. Configure at least one additional ACL action (see https://docs.opencast.org/develop/admin/configuration/acl/)
2. Create a series and configure additional ACL actions for that series
3. Create a new event within that series

Actual Results:
In the Add Event wizard on tab Access Policies, the additional ACL actions of the series are lost

Expected Results:
In the Add Event wizard on tab Access Policies, the additional ACL actions of the series should be present

Workaround (if any):