Meanwhile I found a quite similar bug concerning the TsCombobox: The Glyph (Skin for the Combobox-Button) is always taken from the “default”-combobox skin (see the demo project attached to this reply). Although the lower combobox in the demo-project uses a different skin with a different glyph compared to the upper combobox, both comboboxes show same combobox-button (the combobox-button of the lower combobox should be gray).
I installed version 10.17. During design time the skin is shown correctly, but when I start the application, the skin is still taken from the “default” TRACKBAR-skin.
The combobox-button is also taken from the “default” skin.