Filter (error?) showing empty block

Hello everyone,

I am having some issues with filters in my reports. When I start my report, sometimes it shows empty blocks where filters are applied and then I need to go to filter's options and click "apply" or "OK" again to get the data on my report. It is not a problem for someone who uses webi as designer, but for someone who have only read mode it is not good. Any ideas?  Thx...