Limitation of Office 365 Management Activity API

Hi everyone,

My custom application has a feature to visualize events and activites of files (log) stored in SharePoint Online. I'm really interested in Office 365 Management Activity API (https://msdn.microsoft.com/en-us/office-365/office-365-management-activity-api-reference) to retrieve logs. However what I've realized is that if I try to retrieve large number of logs (around 3,000 files uploaded to SharePoint Online), the application can't seem to fully retrive all. The possible number per my experient is around 1,000 files. Pagination has been applied as well but there is no response header NextPageUrl that Microsoft mentioned here https://msdn.microsoft.com/en-us/office-365/office-365-management-activity-api-reference#list-available-content

Has anyone ever encountered the similar issue? Any recommendation would be greatly appreciated. 

Thank you a lot!

Regards,

-T.s