Chrome OS 65.0.3325.35 (Official Build) dev (64-bit)
Firmware Version	Google_Lulu.6301.136.57

Steps to reproduce:
# Turn on Chromevox screen reader using ctrl + alt + z
# Create new Google Form with an example question that has a short answer field
# In that question, go to More Options Menu > Check "Response Validation"
# Set the validation dropdown fields to "Text" and "email address" 
# View the form as a responder (preview feature will work for this)
# Put focus in the question response edit field. ChromeVox includes "Edit text, email entry" in the description of the field
# Start to type a response in the question field. 
Expected: user is only read warning about email formatting after leaving the edit field. User already received the hint that it must be an email format when focusing on the text box
Actual: User is never given warning about email formatting unless they tab out of the form and tab back into it. 

A user in the mailing lists reported that a warning was being read after each keystroke using NVDA and Firefox. Now I will repro with other software to isolate the issue.