First of all, make sure that you have the latest version of Surge. You do? Alright, the next step is to try to force quit the app (double tapping the Home button on the iPhone or in Settings/Apps/Surge/Force Quit on Android).
If that doesn’t work, please reach out to us on email@example.com - send us the e-mail address connected to your Surge account, description of the problem and ideally screenshots/video to help us identify the problem. We will try to fix the issue as soon as possible.