I built the following bar chart :
When I choose to stack the different categories, I obtain :
We can see that for the date on the right, there is a display issue : we only see one color.
If i point the mouse on some of the categories, I clearly shows that indeed, for the most recent date, there are multiple (3) categories that should be displayed.
I am using the most recent version of Metabase (0.37.5)
Thanks for your help !