Hot reloading doesn't trigger on files read via read_asset_bytes

[SpecificProtagonist]

Bevy version

0.9

What you did

Tried to write an asset loader that combines multiple files and enable hot reloading:

use bevy::{
    asset::{AssetLoader, LoadedAsset},
    prelude::*,
    reflect::TypeUuid,
};

fn main() {
    App::new()
        .add_plugins(DefaultPlugins.set(AssetPlugin {
            watch_for_changes: true,
            ..default()
        }))
        .add_asset_loader(TestAssetLoader)
        .add_asset::<TestAsset>()
        .add_startup_system(load)
        .run();
}

fn load(asset_server: Res<AssetServer>) {
    Box::leak(asset_server.load_untyped("test.main").into());
}

#[derive(TypeUuid)]
#[uuid = "2919310c-fbef-4d84-8f68-1bfb8d8b3ca0"]
struct TestAsset;

struct TestAssetLoader;

impl AssetLoader for TestAssetLoader {
    fn load<'a>(
        &'a self,
        _: &'a [u8],
        load_context: &'a mut bevy::asset::LoadContext,
    ) -> bevy::utils::BoxedFuture<'a, Result<(), bevy::asset::Error>> {
        info!("Loading");
        load_context.set_default_asset(LoadedAsset::new(TestAsset));
        Box::pin(async move {
            load_context.read_asset_bytes("secondary").await?;
            Ok(())
        })
    }

    fn extensions(&self) -> &[&str] {
        &["main"]
    }
}

What went wrong

If test.main gets touched, the asset gets reloaded, but if secondary gets touched, it doesn't.