Application doesn't stop after clicking exit button when view was replaced

[bareq]

TornadoFX 1.17.19
When I use replaceWith() method on my main view to change current displayed window and a new window is closed by hitting close button then it disappear but application is still running and an exception is thrown

java.lang.RuntimeException: Exception in Application stop method
	at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:922)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182)
	at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalStateException: root.scene must not be null
	at tornadofx.UIComponent.unInit(Component.kt:575)
	at tornadofx.App.stop(App.kt:140)
	at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:882)
	at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
	at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
	at java.security.AccessController.doPrivileged(Native Method)
	at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
	at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)

It happens even in login app from samples when you upgrade TornadoFX dependency to 1.17.19 (default 1.17.16). If it changes something, I'm on Mac OS 10.14.5

[monarezio]

I can confirm this error is valid also for windows