Older versions of GOOSE VPN can sometimes have high CPU usage. If this is a problem for your device, it is best to minimise the application.
If the application does not have a default minimise button, then there is an option in the settings called "Minimise to system tray (don't close)". If you enable this option and save it, you can minimise the application by pressing the cross.
The best solution is to use the latest version of GOOSE VPN, so always check whether an update is available. We are constantly improving our app.