Some views open too small/are not visible at all

Material Browser, Content Library and Effect maker (new implementation) views open either too small sized on display or are not visible at all (on macOS) when they are added to a workspace. Attached screenshots from Windows and Linux.

• delete possible existing workspaces (.config/QtProject/workspaces)
• Start Design Studio and create a new project
• Add Content Library and Material Browser view to Default workspace
• -> Result as in attached pictures on Windows and Linux. On macOS could not find views at all from the display.
• Affects also new Effect maker view (see https://bugreports.qt.io/browse/QDS-10484)
• Tested with latest 4.3 snapshot and effect maker view part with my own build (Qt652 based)
• Does not reproduce in DS4.2