If there are 3 or more parent-child structures, it will not be possible to export to GPU instance

[Maiev-42]

Describe the bug
When I want to export GPU instance in blender, if there are three layers of parent-child relationship, I will find that the gpu instance is not used after exporting.

If there are only 2 layers or less, you can export

To Reproduce
Steps to reproduce the behavior:

1. I made five objects with associated object data in blender, one with three layers of parent-child structure and one with two layers
   

2.I exported the model as glb and checked the gpu instance option

3 I put the model into babylon.js and checked it. In the list, I can see that the three layers do not use the gpu instance (so the objects below are independent), while the two layers do (the objects below are merged).

Expected behavior
I hope there is no requirement for the number of parent structures, because if you use collection export, there will inevitably be many layers of parent-child structures.

.blend file/ .gltf (mandatory)
test.zip

Version

• OS: window11
• Blender Version 4.3.1 rc
• addon version 4.3.47

[julienduroure]

Confirmed