Issues with Scatter Chart and Slicer

Hi, 

I would like to create a scatter chart in Power BI to visualize the spatial locations of semiconductor die based on their X and Y coordinates. The goal is to enable dynamic highlighting of specific dies based on the user interaction - QRTAG_U1.

The scatter chart should display all die locations (X vs Y) regardless of user selection. A slicer should allow users to select one or more values from the QRTAG_U1

By default, all die should be displayed in blue. When user selects one or more QRTAG_U1 from the slicer, die associated with the selected QRTAG_U1 should appear in red and all other die should remain in blue.

I’ve created a DAX measure for conditional formatting to change the color of points in a scatter chart based on the selected QRTAG_U1. However, when a QRTAG_U1 value is selected, only the points for that selection appear in red, and the other die locations do not remain visible in blue. May I know how can we enable the scatter chart to keep all other die locations displayed in blue while showing the selected QRTAG_U1 points in red?

DieColor = 
VAR _SelectedQRTAG = SELECTEDVALUE('wafer'[QRTAG_U1])
VAR _CurrentQRTAG = MAX('wafer'[QRTAG_U1])
RETURN
    IF (
        HASONEFILTER('wafer'[QRTAG_U1]), 
        IF (
            _CurrentQRTAG = _SelectedQRTAG,
            "Red",
            "Blue"
        ),
        "Blue"
    )

I have uploaded the sample data here:

https://drive.google.com/drive/folders/1sAcuXrYpx8tg3jNmxIa29r6cjWlX0bTj?usp=sharing 

Thanks for any assistance!