Recently in a SharePoint 2010 farm, we found a problem where was not possible to apply a multivalue filter in a report made with Reporting Services for SharePoint. The Reporting Add-in installed is from SQL server 2012 SP1 version.
In this case, we have a report where are showed several customers with their data, if we select data from the current year (2015), it Works perfectly, as it shows the next figure:
But if we select the same data but from other year, then the report shows blank data.
Don’t panic, it is a bug in in the add-in for Reporting in SharePoint, so please update the SQL add-in to SP2 in each one of the front-end, and the problem will be solved.
Good luck!
Albandrod's Memory 