A bug in the .net framework causes SQL Server Reporting Services (SSRS) reports to “lose” their parameter values when paging through the report when to stay on a page for longer than 1 minute.
When you click the next page button, you will be presented with the parameter prompt again:
- You have a multi-page report in SSRS in SharePoint that includes required parameters
- If you sit on a page of the report for more than 1 minute, you are re-prompted for parameter values and must re-run the report
This is a known problem in the .NET framework. Please reference the following KB: https://support.microsoft.com/en-us/kb/2996566
MSFT does not have the download link published, so you will need to contact support to be sent the hotfix. As of this writing, this hotfix has not been included in any public patches or updates.