If your Shelvspace App is unresponsive and your device still reacts to the home screen button, you can Force Quit your application.
- Press the Home button two times quickly. You'll see small previews of your recently used apps.
- Swipe left to find the app you want to close.
- Swipe up on the app's preview to close it.
For additional information visit the Apple Support page.
- Open your device's Settings.
- Tap Apps.
- Tap on Shelvspace.
- Tap Stop or FORCE STOP.
- Tap OK.
For screenshot examples visit: https://www.wikihow.tech/Force-Quit-Apps-on-Android