Pie Chart shows identitical colors for different labels

I’m trying to display a pie chart from a very simple 2 columns table, 1 with a Genre label, the other one with the count value for the Genre. This is obtained through calculation transformation and group by.

Here is the table:

However, the pie chart somehow decided to base it’s colors on the count values instead ot the labels values, resulting in identical colors for rows that have the same values. How can I change that ?

Does re-ordering your Transformations change anything? (i.e. first Group by and second Add field from calculation)

Well I found out I didn’t even need the calculation and could get the same results with groupby only by calculating an other field’s count, but with the same exact issue on the pie chart:

Bump… I’ve tried every kind of transformation and didn’t find what was wrong… Any idea ? Is it a bug ?