That’s what I done 
With your GLB file
by user 224464722878005248
Please try with your original FBX!
Also which Needle Engine version are you on? I believe there was a bug quite a while ago where blendshape normals weren’t exported, but that should be fixed for quite a while now
Now on 2.61.0
by user 224464722878005248
Looks like there’s a bug with sparse accessor export in UnityGltf that’s affecting your mesh. I’ll disable sparse accessors for the time being to work around it.
Ok thanks, I’ll look at it if it changes something
by user 224464722878005248