Gizmos are rendered behind meshes with positive z-coordinate on 2d

[Dentosal]

Bevy version

Bevy 0.15.0 from crates.io. The result is same with 9cebc66 (latest main at the time of writing).

$ cargo --version
cargo 1.83.0
$ cargo run
[...]
SystemInfo { os: "MacOS 14.6.1 ", kernel: "23.6.0", cpu: "Apple M3 Max", core_count: "16", memory: "128.0 GiB" }
AdapterInfo { name: "Apple M3 Max", vendor: 0, device: 0, device_type: IntegratedGpu, driver: "", driver_info: "", backend: Metal }

What you did

I'm trying to use gizmos with 2d camera, while using z coordinate to maintain draw ordering of my objects.

use bevy::{color::palettes::css::*, prelude::*};
fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .insert_resource(ClearColor(WHITE.into()))
        .add_systems(Startup, setup)
        .add_systems(Update, show_gizmo)
        .run();
}
fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<ColorMaterial>>,
) {
    commands.spawn(Camera2d);
    commands.spawn((
        Mesh2d(meshes.add(Rectangle::new(50.0, 50.0))),
        MeshMaterial2d(materials.add(Color::from(BLACK))),
        Transform::from_xyz(-50.0, 0.0, 0.0),
    ));
    commands.spawn((
        Mesh2d(meshes.add(Rectangle::new(50.0, 50.0))),
        MeshMaterial2d(materials.add(Color::from(BLACK))),
        Transform::from_xyz(50.0, 0.0, 1.0),
    ));
}
fn show_gizmo(mut gizmos: Gizmos) {
    gizmos.line_2d(Vec2::new(-200.0, 0.0), Vec2::new(200.0, 0.0), RED);
}

What went wrong

I was expecting the gizmos to be rendered on top. However, meshes with z-coordinate > 0 are rendered on top of gizmos.

Curiously the behavior on bevy 0.14.2 is what I expected. (Click to show code)

use bevy::{color::palettes::css::*, prelude::*, sprite::MaterialMesh2dBundle};

fn main() {
    App::new()
        .add_plugins(DefaultPlugins)
        .insert_resource(ClearColor(WHITE.into()))
        .add_systems(Startup, setup)
        .add_systems(Update, show_gizmo)
        .run();
}
fn setup(
    mut commands: Commands,
    mut meshes: ResMut<Assets<Mesh>>,
    mut materials: ResMut<Assets<ColorMaterial>>,
) {
    commands.spawn(Camera2dBundle::default());
    commands.spawn(MaterialMesh2dBundle {
        mesh: meshes.add(Rectangle::new(50.0, 50.0)).into(),
        transform: Transform::from_xyz(-50.0, 0.0, 0.0),
        material: materials.add(Color::from(BLACK)),
        ..default()
    });
    commands.spawn(MaterialMesh2dBundle {
        mesh: meshes.add(Rectangle::new(50.0, 50.0)).into(),
        transform: Transform::from_xyz(50.0, 0.0, 1.0),
        material: materials.add(Color::from(BLACK)),
        ..default()
    });
}
fn show_gizmo(mut gizmos: Gizmos) {
    gizmos.line_2d(Vec2::new(-200.0, 0.0), Vec2::new(200.0, 0.0), RED);
}

[skimmedsquare]

This change in behavior seems to have been introduced with 5abc32c - comparing it and the parent commit with the example snippets provided shows the breakage.

I think I have a potential fix for this, though I'm relatively unfamiliar with rendering.