JAWS reads the text of items that have child elements twice #934

Summary:
JAWS reads the text of items that have child elements twice.

Example - https://snippix.only.sap/#334127
When focused, items such as ‘Focus applications’ and ‘Sourcing’ are announced twice.

Pure HTML example - https://snippix.only.sap/#785226
When the ‘About’ item receives focus, it is announced twice.

The issue is reproducible in the best practice “Navigation Treeview Example” - https://www.w3.org/WAI/ARIA/apg/patterns/treeview/examples/treeview-navigation/

Issue reproducible with latest version of Jaws