Some of the widgets cannot be adjusted in terms of the content width. If I use for example the tabs widget (Design Option), the width is preset to 92%. When I change the width for example to 80% the changes are adopted to the widget on the slide. But if change the slide an come back, the widget is agein displayed in 92% although the width value is set to 80%

The card widget (Verticle, bottom text) behaves the same.