Power Pivot Data Not Working When Unselecting A Value in a Slicer

Hi,

I have a power pivot model with several slicers using cube formulas. All my slicers function properly when selecting data (either individually or when selecting multiple values), but on certain slicers, when I unselect a value my model errors out and returns no

data.

When unselecting the slicer doesn't work.

When selecting the specifc value, the slicer works.

Any thoughts as to what's causing this and/or how to trouble shoot.

Best,

Power_Pivot_123