box plot, group column has more than 20 distinct values

i think this is bug. 
I have a variable that has 30 distinct values, so i filter out half of them using 'filter examples'.
I check how many distinct values i have using aggregate operator, i have 15 different distinct values. 
... but the box plot still doesn't want to plot. 

i had to export my data into excel, filter out the same examples and then re-upload the data back into RM.
using the store-operator to save the filtered data in repository, still preserves the other distinct values that are no longer in the data... RM still thinks there is >20 distinct values.
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    Marco_BoeckMarco_Boeck Administrator, Moderator, Employee, Member, University Professor Posts: 1,996 RM Engineering

    Unfortunately, that's a known issue. Until the check is fixed for the Visualizations, you can add a Remove Unused Values operator, that will also purge the zero-occurence values. After that, it would work w/o the Excel trick.

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