Version: 66.0.3329.0
Reproduction Steps: 
1. Enable Chromevox, and press CVox+a,t and set typing echo to no typing echo.
2. inbox.google.com>>compose a new message by pressing c or reply to an existing message.
3. Type a line of text, and press enter.
Expected: I should not hear any utterances until or unless I trigger an action that requires speech, such as navigating or manipulating text.
Actual: When pressing enter, Chromevox announces new line.