Danval31 wrote:
• My table is capitalized using Format>Font>Capitalization>All Caps (Sophia --> SOPHIA).
Ah, I see. That makes the text appear capitalized but the value in the cell is not changed, as you can verify by looking lower left.

You need actual all caps in the table for that to be reflected in the chart.
You can double-click a cell and select the text within it, then from the menu choose Edit > Transformations > Make Upper Case.
If you have a lot to convert then you can consider using the UPPER() function.
SG