Blender exported GLTF Animation is warped then fixes itself then breaks again

I have a model with an animation in blender that is working as intended:


Blend File:

When I export as GLTF and import it into threejs it looks fine until I start the animation then I get this weird distortion that over time begins to correct itself before breaking again.

Screencap Broken:

Screencap Fixed:

GLTF File:

Any help would be greatly appreciated.



If the file also looks incorrect in engines other than three.js ( is an easy place to test), it is a bug in the exporter.

Can it be fixed?

@Aerion there are many updates being posted on GitHub, I would suggest following along there.