Raport is extremely small when too many items in multivalue filter selected.

Hello,

I have a problem with report built in SSRS and deployed with Dashboard Designer to Sharepoint. There are few filters connected to report, 2 of them are multivalue. Regardless of data returned, when I select too many items in filter, the report is getting super small. It doesn't matter what you select, size changes when you select exact number of items or more. I replaced report with single line (filters where still conected) - result was the same.



Small amount of items selected:

More items selected:

Size of the raport in Dashboard Designer is set to "Percentage of dashboard page", when I selected autosize, result was the same. I don't understand the behaviour of this report, do you know what is going on?

Thanks in advance,

MichalGo