For some elements that allow a user either to select or not select a single option (like a checkbox or radio buttons) or to select from among 2 or more options (like a select dropdown), the state (such as checked/unchecked or selected/not selected) is not conveyed to assistive technology, so people who uses a screen reader or other assistive technology may not be able to understand the purpose of each element, the options available, and whether the element or an option is currently checked and there associated labels
Clarity: 16.3.1
The issue is under review by engineering and will be addressed in future release.