Gltf Loader Group, Object3D

When using the three js gltf loader, does the glb file have a sms group wrapped under the scene, and if you look at the children, is there a type whose type is object3D sometimes?

I don’t know what you want to do
but Most of scene’s children type is Object3D, children extend Object3D
Need More detail for accurate answer

If you look at the capture pictures, you can see that the same 3d model is loaded, but the order of children? is different, so why?

I can’t see that from the image — the UUIDs will be unique each time, but the order should be the same. If you’re sure the children are being loaded in a different order some of the time, and can share code and a model to reproduce the issue, I would recommend filing a bug.