Steps to reproduce:

1. Visit https://w3c.github.io/aria-practices/examples/grid/dataGrids.html
2. Navigate to the grid in the second example
3. Navigate to the first column header (the sort state is announced)
4. Change the sort state

Actual behavior:

Changes to the aria-sort property are not announced

Expected behavior:

Changes to aria-sort are announced

System configuration

NVDA installed

NVDA version: 2019.3.1

Windows version: Windows 10, version 1909

Name and version of other software in use when reproducing the issue:

• Firefox 74.0
• Chrome 80.0.3987.149
• Edge 82.0.458.0