use threebox to add glb models to mapbox with some problem

[vscchencc]

I have used threebox to add custom models

const loader = new GLTFLoader();

loader.load('/assets/test.glb',function(obj){
      obj.scene.rotation.x = 90 * Math.PI / 180;
     obj.scene.scale.set(50,50,50);

      threebox.addAtCoordinate(obj.scene,[112.5609,37.85418]);
})

In chrome . the models has added successful. But the console appeared a warning

THREE.Matrix3: getInverse() can't invert matrix , determinant is 0

if i drag the map , the console has appeared a lot of warnings.

the second question

const data = [
    [112.5609,37.85418],
    [112.5109,37.85418],
    [112.5309,37.85418],
]
for(let i = 0; i < data.length; i++) {
    threebox.addAtCoordinate(obj.scene,data[i]);
}

I use the above code,It only shows one model on the map.

const data = [
    [112.5609,37.85418],
    [112.5109,37.85418],
    [112.5309,37.85418],
]
for(let i = 0; i < data.length; i++) {
    threebox.addAtCoordinate(obj.scene.clone(),data[i]);
}

It has worked, But It also appears a lot of warnings.

thx.