Crash when pressing the back button

[opk12]

Launch the app, choose location, press Apply, press the phone's Back button at the right to quit the app. There is the message Fake traveler was closed. Mock location stopped, then there is Android's pop-up notification that Fake Traveler crashed or keeps crashing.

Information:

• OS: Android 7
• FakeTraveler version: 1.7 from F-droid

Additional context
This does not happen if Apply was not pressed, or if Stop was pressed.

java.lang.RuntimeException: Unable to destroy activity {cl.coders.faketraveler/cl.coders.faketraveler.MainActivity}: java.lang.IllegalArgumentException: Provider "network" unknown
	at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:4670)
	at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:4697)
	at android.app.ActivityThread.-wrap7(ActivityThread.java)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1720)
	at android.os.Handler.dispatchMessage(Handler.java:102)
	at android.os.Looper.loop(Looper.java:154)
	at android.app.ActivityThread.main(ActivityThread.java:6816)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1563)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1451)
Caused by: java.lang.IllegalArgumentException: Provider "network" unknown
	at android.os.Parcel.readException(Parcel.java:1716)
	at android.os.Parcel.readException(Parcel.java:1662)
	at android.location.ILocationManager$Stub$Proxy.removeTestProvider(ILocationManager.java:1212)
	at android.location.LocationManager.removeTestProvider(LocationManager.java:1254)
	at cl.coders.faketraveler.MockLocationProvider.shutdown(MockLocationProvider.java:79)
	at cl.coders.faketraveler.MainActivity.stopMockingLocation(MainActivity.java:371)
	at cl.coders.faketraveler.MainActivity.onDestroy(MainActivity.java:188)
	at android.app.Activity.performDestroy(Activity.java:7255)
	at android.app.Instrumentation.callActivityOnDestroy(Instrumentation.java:1161)
	at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:4657)
	... 9 more