The UI element referenced as a card widget (DIV classes), one that has the Change visualisation option, has a bug.

When you select Insights from the dropdown menu, the next time you open it it becomes hidden (or contained perhaps) inside the widget area. You need to scroll down (inside the widget) to see it. Other options do not cause this, regardless of in what order you select them. You need to change it back to one of the other options and then refresh the page (or go to another one and then back) to fix it. If you keep the Insights option selected, the dropdown menu is always hidden inside the widget, even after a page refresh.

Here it works as expected.

It is again working as expected after you select an option other than Insights.

This is what you see after you select Insights.

And you have to scroll down inside the widget to see the full dropdown.

Piwik version is 3.0.0.