JQL function - Requirements() ignores the scope of the "Saved filter" argument.

Summary
requirements('OK','XSP15','','','','','Saved filter') JQL function ignores the scope of the "Saved filter" argument.

 
Description
When using the requirements('OK','XSP15','','','','','Saved filter') JQL function and passing a saved filter as the last argument, the function returns all requirements within the specified project instead of filtering them by the saved filter's results.
 
Pre-conditions
 
A Test Plan exists (e.g., XSP15-33) with specific requirements indirectly associated.
 
A saved filter is created using the JQL: issue in testPlanRequirements("XSP15-33").
 
How to reproduce:

• Create a saved filter (e.g., named "Xra") with the query: issue in testPlanRequirements("XSP15-33").
• Navigate to the Issue Navigator.
• Run the following JQL: issue in requirements('NOK','XSP15','','','','','Xra').
• Observe the number of issues returned.

Actual result:
The JQL retrieves all requirements in the project XSP15 with Overall Status - OK, completely ignoring the constraints of the "Xra" filter.
 
Expected result:
The JQL should only return issues that meet the project criteria, Status AND are included in the results of the "Xra" filter.