Scatter plot not responding to first non-blank slicer/filter value but other values ok

Hi,

I have a report that has a slicer, table and scatter chart on a page.  The slicer is linked to the scatter chart and table. When I select the first value non-blank value in the slicer, the scatter chart does not change. However, the table does filter.

When I select the 2nd value, both the scatter plot and table filter.  If I choose the first value again, the scatter plot retains its current state, however, the table is filtered appropriately. 

This misbehavior only seems to illustrated when dealing with the first non-blank entry in the slider/filter.

Does anyone have any ideas?

Thanks

Eric