IssueTracker

Could you please provide a minimal sample that reproduces this issue?

Yes, of course

@Composable
private fun DemoNavHost() {
    val controller = rememberNavController()
    NavHost(
        navController = controller,
        startDestination = "mainRoute",
        modifier = Modifier.fillMaxSize()
    ) {

        composable("mainRoute") {
            Surface() {
                Box(Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
                    Button(
                        onClick = {
                            controller.navigate("demoDialog")
                            controller.navigate("demoDialog")   // Simulate a quick click by the user
                        }
                    ) {
                        Text(text = "show dialog")
                    }
                }
            }
        }

        dialog("demoDialog") {
            val context = LocalContext.current
            val lifecycle = LocalLifecycleOwner.current
            Surface() {
                Column() {
                    Text(text = "I'm demo dialog")
                    Button(
                        onClick = {
                            Toast
                                .makeText(
                                    context,
                                    "${lifecycle.lifecycle.currentState}",
                                    Toast.LENGTH_SHORT
                                )
                                .show()
                        }
                    ) {
                        Text(text = "check lifecycle")
                    }
                    Button(onClick = controller::popBackStack) {
                        Text(text = "close")
                    }
                }
            }
        }
    }
}

Steps:

Step 1: Click the show dialog button on mainRoute

Step 2: Because 2 pop-up windows pop up, we close the top one

Step 3: Click the check lifecycle button on the pop-up window, you can see STARTED instead of RESUMED

I have also checked the cause, which is consistent with the description in my question.

In fact, I found another problem. When the tester frequently clicks the button, the button event is to display a Dialog, Dialog is set to be destroyed by external click, so Dialog is always displayed and destroyed

Interesting thing, because it may be too fast, causing DialogHost to not notice that Dialog appears and disappears, but it has actually joined NavController#_visibleEntries

But because NavHost#DialogHost did not process DisposableEffect, it will not execute dialogNavigator#onTransitionComplete, so it will not be removed from NavController#_visibleEntries, and a NavBackStackEntry leak occurs

The reason may be that the pop-up window appears and disappears within one frame