Please see if the workbook attached in the Forum thread is similar to yours.
I have two datasets: one where "Father" is the fills the whole set so it is 100%
and another where there are three choices so "Father" is just part of it.
Once I changed the color for "True" for "Color Percentage" on the color legend,
it looked like 100% was showing up.
If this doesn't match your setup, please adjust the workbook and dataset