After updating to compose 1.7, I notice the Material 3 `ModalNavigationDrawer` very briefly (maybe 1...

# compose

[Mark]

After updating to compose 1.7, I notice the Material 3 ModalNavigationDrawer very briefly (maybe 100ms or so) flashes up on the screen. What could be causing this?

[Mark]

So the issue happens when setContent (usually called from onCreate) is actually called a little later. In my app, I collect a startup-state flow and call setContent when a success state is reached. You can simulate this with:

// simulate waiting for some startup event to complete
GlobalScope.launch(Dispatchers.Main) {
    delay(1.seconds)
    setContent {
        AppTheme {
            ModalNavigationDrawer(
                drawerContent = {
                    ModalDrawerSheet {
                        ...
                    }
                }
            ) {
                ...
            }
        }
    }
}

So, is this a bug or WAI?

[Mark]

Nasty workaround is to apply an alpha like this:

var drawerAlpha by rememberSaveable {
    mutableFloatStateOf(0f)
}
LaunchedEffect(Unit) {
    delay(500.milliseconds)
    drawerAlpha = 1f
}
ModalDrawerSheet(
    modifier = Modifier.alpha(drawerAlpha),
    ...

[Mark]

They’ve now fixed it: https://issuetracker.google.com/issues/369246566