For some websites, the CVC doesn't get filled by autofill after prompting the user, because the forms sections are not accurate:
Example Sites:
homedepot.com (Desktop)
Freepeople.com (Desktop)
expedia.com (Android)
williamssonoma.com (Android)
potterybarn.com (Android)
Also, the dropdown values for dates don't get filled.
homedepot.com (Desktop)
Freepeople.com (Desktop)
Comment 1 by parastoog@chromium.org
, Dec 8 2017