Pie chart labels

I have this situation:

The upper table and Piechart shows the values for the duration in seconds.
And the labels on the Piechart shows ok.
The lower table and Pierchart show are showing the duration in more ‘readable’ format (hours:minutes:seconds).
But the labels on the Piechart are not showing, what is in the table…?

Is it possible somehow to show the duration in Piechart labels like HH:MM:SS?

EDIT: Ignition 7.9.14