USWDS Combo Box testing

This is a reasonably long paragraph inside a form with the .usa-form class. The max-width is 20rem (units("mobile")) here, which is probably related to the accessibility guidance to "use simple vertical layouts"?

Try opening the first combo box, and notice how visual elements from the second combo box appear above the first combo box's list.

Select a fruit

Select another fruit

This form still has the .usa-form class, but now the combo boxes have a .width-tablet class.

Select a fruit

Select another fruit

This form doesn't have the .usa-form class. I can write however much I want in here.

Select a fruit

Select another fruit