That's odd. Let us know if reuploading the thumbnail does the trick. Let us know.
Glad it's working fine! Let us know if the issue persists and we'll look into it.
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
Glad it's working fine! Let us know if the issue persists and we'll look into it.