@TeamYouTube Why is my thumbnail still not showing after 3 days. I have checked on other Browsers and still this problem keeps coming up!pic.twitter.com/AfZZjbTYZU
You can add location information to your Tweets, such as your city or precise location, from the web and via third-party applications. You always have the option to delete your Tweet location history. Learn more
While we can't take you off, note that only 0.3% of viewers will see an auto-generated thumbnail and the other 99.7% still see your custom thumbnail. The experiment should end in a few weeks: https://goo.gl/A7oDmr