TAdvGlowButton Font Colour Issue

The TAdvGlowButton Font Colour property doesn't show the colour descriptions in the dropdown list unless the list's scrollbar is clicked.

W10, Delphi 10.4.2

I'm not sure what you mean.
Are you referring to some behavior at the design-time in the object inspector here?
I cannot see an issue with this:

I was, yes. However, today it's ok and as shown in your screenshot - and I can't reproduce the issue. Please disregard the report.