That's strange! Have you tried uninstalling and reinstalling the app? Also, make sure you have the latest version for the app and devices's OS installed. Keep us posted.
Glad it's fixed! Give us a shout if you still have any questions in future. 
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 fixed! Give us a shout if you still have any questions in future. 