Meshes are missing parts when multiple batches are needed to render scene

[pavels]

When multiple batches are used to render scene (lot of triangles), meshes are missing parts

Here is reproduction code:

class Example extends Phaser.Scene
{
    constructor ()
    {
        super();
    }

    preload ()
    {
        this.load.image('ayu', 'assets/pics/ayu.png');
    }

    create ()
    {
        var cnt = 10;

        for(var i = 0; i < cnt; i++) {
            for(var j = 0; j < cnt; j++) {        
                const mesh = this.add.mesh(50 + i * 100, 50 + j  * 100, 'ayu');
                Phaser.Geom.Mesh.GenerateGridVerts({
                    mesh,
                    widthSegments: 10
                });
                mesh.hideCCW = false;
                mesh.panZ(20);
            }
        }
    }

    update ()
    {
    }
}

const config = {
    type: Phaser.AUTO,
    width: 1000,
    height: 800,
    backgroundColor: '#0a440a',
    parent: 'phaser-example',
    scene: Example,
    batchSize: 512,
};

let game = new Phaser.Game(config);

The problem is artificially exaggerated by setting small batchSize but happens even on default settings - you will just need more triangles on scene for this to happen.

This happens on 3.80.1 and down to at lest 3.55.2

[photonstorm]

Thank you for submitting this issue. We have fixed this and the fix has been pushed to the master branch. It will be part of the next release. If you get time to build and test it for yourself we would appreciate that.