Jetpack Compose navigation NavController.popBackStack() not working properly

Question

When working with Compose Navigation and calling NavController.popBackStack() multiple times on the first shown Composable ( startDestination ) the backnavigation does not work anymore. For example when navigating to another Composable from this point on and then calling popBackStack does not have an effect.

Answer 1

For some Reason the size of the NavController.backQueue is at least 2 even though it's supposed to only show one Composable. If popping the backstack lower than that, the navigation does not seem to work anymore. (I don't know why)

Therefore I wrote the following simple extension function which prevents popping the BackQueue lower than 2:

fun NavController.navigateBack() {
    if (backQueue.size > 2) {
        popBackStack()
    }
}

You can use it like this:

val navController = rememberNavController()
...
navController.navigateBack()