Leap 42.1
KDE

Dolphin does not display generic folder icons for icon themes other than "Breeze"

For example, choosing the "Adwaita" icon theme and logging out & in results in folders such as "Documents" and "Music" showing with a customized icon but generic folders show nothing.

This occurs for existing folders and when creating a new folder.

Have experimented with other icon themes as well.

Theme "Breeze" appears to display OK.