Hi @chrisrcampart, please do check out this guide and question post:
- Mixamo - Babylon.js Documentation (multiple animations)
- Problem Loading Meshes with Textures (includes a video of exporting 1 animation)
I’m guessing that in order to use animation ranges, the animation keyframes in Blender should be placed one after the other in the same time track, rather than each animation having its own separate time track.