SpriteAtlas draw calls NOT batched

Sample Xcode 13 project using a Sprite Atlas inside an Assets Catalog.

• When using the SKTextureAtlas(named:) initializer to load the texture atlas from data stored in the app bundle, the draw calls are not batched.
• When using the SKTextureAtlas(dictionary:) initializer to create a texture atlas from a set of image files, the draw calls are batched.

Related questions:

• https://stackoverflow.com/questions/69957326/spritekit-draw-calls-not-batched-when-using-a-texture-atlas-from-data-stored-in
• https://developer.apple.com/forums/thread/694641

Visual

Here, there are 2 draw calls, one for each sprite node:

Here, there is only 1 draw call, batched:

The SpriteAtlas in the Assets Catalog:

The code is very simple, in GameScene.swift:

import SpriteKit

class GameScene: SKScene {
    
    override func didMove(to view: SKView) {
        let atlas = SKTextureAtlas(named: "Sprites")
//        let atlas = SKTextureAtlas(dictionary: ["costume": UIImage(named: "costume")!, "tank": UIImage(named: "tank")!])
        
        let costume = SKSpriteNode(texture: atlas.textureNamed("costume"))
        costume.setScale(0.3)
        costume.position = CGPoint(x: 200, y: 650)
        
        let tank = SKSpriteNode(texture: atlas.textureNamed("tank"))
        tank.setScale(0.3)
        tank.position = CGPoint(x: 500, y: 650)
        
        addChild(costume)
        addChild(tank)
    }
}