/usr/share/sddm/themes/ubuntustudo/Main.qml is merely a symlink to /usr/share/sddm/themes/breeze/Main.qml, which comes from the sddm-theme-breeze, whose source package is plasma-workspace. This means this is not a bug with ubuntustudio-default-settings, but rather a bug with plasma-workspace.
/usr/share/ sddm/themes/ ubuntustudo/ Main.qml is merely a symlink to /usr/share/ sddm/themes/ breeze/ Main.qml, which comes from the sddm-theme-breeze, whose source package is plasma-workspace. This means this is not a bug with ubuntustudio- default- settings, but rather a bug with plasma-workspace.