A report added in a dashboard is shown with blank spaces on each side, shrinking the image in stead of displaying it over the whole screen width. This is a cosmetic issue, all the information in the report is visible, but in a narrow graphic rather than in full width.
This behaviour is encountered in an instance upgraded to London.
The display offset is seen in only Internet Explorer version 11. In Microsoft Edge and other browsers it is working as expected.
The display offset happens on upgraded instances, where the older dashboards are non responsive. On responsive dashboards, the widget is shown in full width.