LibGDX: black bar on top in immersive mode

Question

I need to use immersive mode in my project, so I put this in my AdroidLauncher.java:

config.useImmersiveMode = true;

But I still have a black bar on top of the screen (as on screenshots below). How can I make the app draw there too?

screenshot1, navigation turned off

screenshot2, navigation turned on

I run the app on API 30 (Android 11), libGDX version is 1.11.0.