Hello,
so, this was found in AP Beta 1.9.0.829 on MacOSX 10.11.6.
Since I am interested in underline options in 1.9, I defined Character Style with underline options, clicked OK and close the Character Style window.
Later I tried to make some adjustements, so I double-clicked the Character Syle in the panel, which evoked the Character Style window, but previously defined options weren't there.