Line chart renamed field changes to original name when in visual calculation view

In the added video you can see an example of the following steps.

1. Add a field to the y-axis of a line chart.
2. Rename the field.
3. Moved the field to the secondary y-axis.
4. Go to the visual calculation view and see that the original name of the renamed field is shown.
5. Going back to the report visual, the field shows the renamed name.

The same happens when...

1. Add a field to the y-axis of a line chart.
2. Rename the field.
3. Go to the visual calculation view and move the field to the secondary y-axis.
4. The field name is directly changed to the original name.
5. Going back to the report visual, the field shows the renamed name.