Ruby Rose - Import Difference between Three.js and glTF-Blender-IO

[fire]

Describe the bug
I'm trying to write a GLTF2 exporter. So the output is somewhat out of specification and rough, but the animation in this file plays differently in Blender compared to Three.js.

To Reproduce
Steps to reproduce the behavior:

1. Go to blender
2. Import gltf.
3. See that the female character moves.

Expected behavior
The animation should play like in Codium's three.js.

Screenshots

.blend file/ .gltf
ruby_rose.zip

The blend file is 40mb, so you can open the gltf2 in blender 2.81. I can post it if you want.

Version

• OS: Linux
• Blender Version 2.81

Additional context

https://sketchfab.com/3d-models/ruby-rose-2270ee59d38e409491a76451f6c6ef80

The main difference is three.js works and Blender import doesn't. So this import problem is blocking my use case of doing gltf2 exports to Blender.