Customer 360: Usage Adoption: Normalize percentages do not display when Normalize and Milestone both selected

I observed today that when I am using the Usage Adoption tab on the Customer 360, and I have selected both Normalize and Milestones in the show criteria, when I hover over a data point, the normalize percentages do not appear in the weekly details:

If I uncheck the Milestone field, the normalize percentages DO appear in the weekly details: