Hi,
We are using JIRA for issues and user story maintenance purpose. We have 6000+ issues totally. By default JIRA shows 50 per page so we have configured the page size to 1000 from User Preferences screen.
After came to Search Results screen which is currently showing 6358 issues. Now it is showing 1000 per page. In this case, we can able to export the first set of issues i.e. 1000 using Export option. When we click on the page number hyperlink at the bottom of the grid ( search results ), it is not navigating to the next page. 
Kindly guide us to resolve this complexity.
Thanks,
Karunagara Pandi G