Measure driven data labels bug in lne and stacked column chart when reversing column stack

The measure driven data labels have a bug in lne and stacked column chart when reversing the column stack.

In this report I have selected data labels for "sales total" and then changed the custom label field to "budget sales".  However the data label for "cost total" (yellow on the chart) changes to "4M" as this is the value of "budget sales".  

I have uploaded a copy of my file here:
PBI file 

Thanks,

Tim