Any options in the Look & Feel themes disappear after clicking away from the tab. They will not reappear until you close out of the window and reopen the "Workspace Theme" menu item. Steps to Reproduce: 1. Open system settings 2. Click "Workspace Themes" 3. Click any tab other than the "Look & Feel" tab 4. Go back to the "Look & Feel" tab Actual Results: All theme options are gone & the "Get new looks" button does nothing when clicked. Expected Results: Installed themes should be visible & "Get new looks" button should launch a dialog when clicked
Created attachment 114850 [details] video of bug
Fixed in the Plasma 5.13 rewrite.