Scaled Images derived from a DynamicTexture disappear when mipmapped

Version

• Phaser Version: 3.88.2

• Operating system: MacOS 15.4.1

• Browser: Chrome 135.0.7049.115

Description

When the render setting mipmapFilter is set to a mipmap setting, scaled images/sprites derived from a dynamic texture frame become increasingly transparent as they are scaled down until completely transparent by a scale of ~0.75 to ~0.5. Some mipmap settings make it fade slowly, while others cut out suddenly.

Solution for now is to avoid mipmapFilters.

Example Test Code

class Example extends Phaser.Scene
{
    preload ()
    {
        this.load.setBaseURL('https://cdn.phaserfiles.com/v385');
        this.load.image('uv', 'assets/pics/uv-grid-4096-ian-maclachlan.png');
        this.dt = this.textures.addDynamicTexture('main', 4096, 4096);
    }

    create ()
    {
        this.dt.draw('uv', 0, 0);
        this.dt.add('AABB', 0, 0, 0, 512, 512);
        
        // shows up fine
        this.add.image(0, 300, 'main', 'AABB').setOrigin(0,0).setDisplaySize(512, 512);
        
        // transparent??
        this.add.image(0, 0, 'main', 'AABB').setOrigin(0,0).setDisplaySize(300, 300);

        // completely gone
        this.add.image(300, 0, 'main', 'AABB').setOrigin(0,0).setDisplaySize(200, 200);
        this.add.image(500, 0, 'main', 'AABB').setOrigin(0,0).setDisplaySize(100, 100);
    }
}

const config = {
    type: Phaser.AUTO,
    parent: 'phaser-example',
    mipmapFilter: 'LINEAR_MIPMAP_LINEAR',
    scene: Example
};

const game = new Phaser.Game(config);

Additional Information

Start with the supplied Example scene and reproduce the issue using a DynamicTexture frame, scaled images, and the mipmapFilter setting. Trace the DynamicTexture and mipmap-related rendering entry points from there; done means scaled images derived from the frame remain visible rather than fading or disappearing.