Trouble scheduling my system after physics

[vladmikhalin]

I am making a simple top-down player controller. I have a system that updates camera position by adding (10, 10, 10) to player coordinates. Player is moved by adding velocity to a Kinematic body. I have scheduled my system to run after PhysicsSet::Sync in PostUpdate schedule. This works smoothly only half the time. The other half the movement is jittery. Fells like camera position is not updated in time.

In bad runs it looks like this:

In good runs it works like this:

Am I doing something wrong? Or maybe this is a known issue?
Relevant code:

.add_plugins((
    PhysicsPlugins::default(),
))

.add_systems(PostUpdate, camera_tracking_system.after(PhysicsSet::Sync))

fn camera_tracking_system(
    mut camera_query: Query<&mut Transform, (With<PlayerCamera>, Without<PlayerCharacter>)>,
    player_query: Query<&Transform, With<PlayerCharacter>>,
) {
    if let Ok(player) = player_query.get_single() {
        if let Ok(mut camera) = camera_query.get_single_mut() {
            camera.translation = player.translation + Vec3::new(10., 10., 10.);
        }
    }
}

[vladmikhalin]

Ok, I think I understand what happens. GlobalTransform is also updated in PostUpdate and my system is scheduled after that.

[vladmikhalin]

I see that there is a solution in #211