Mode: force_next
Version: 55.0.2842.0
Reproduction Steps: 
1. Enable Chromevox Next.
2. docs.google.com
3. Open any document or create a new one.
4. Enter suggested editing mode from view>>mode>>suggested editing
5. Type three lines of text.
6. Navigate to the top of the document, and read the document with the arrow keys, line by line.
Expected: An announcement that editing mode has started. Each of line to be read once. And an announcement when editing mode ends.
Actual: The message that editing mode has started is uttered. However, moving to line two makes another announcement about editing mode. And every line read is uttered twice.