The beginning balance will appear as $0 for the Net Asset account because the department segment is not marked to "preserve details during closing". The $0 balance occurs because the department does not have its own Net Asset account. A balance will only show when filtering on the department that the Net Asset account is defined for. 

The fund transaction requirements and Net Asset account defined for a fund can be found in General Ledger, Configuration, Funds, fund transaction requirements tab

For example:
Account Structure: fund-account code-department
The Net Asset account is defined as 01-3000-00

If the report filter does not include department 00 then the beginning balance will show as $0 
If the department is included the beginning balance for the entire fund will appear