“Bug” still appears in 4.8. Any news on this issue? I’m experiencing it too…
It seems to have something to do with morphs. I’ve tried to import the FBX into Blender and have some issues there as well. Bones (assumably of morphs) sticking out of the geometry look pretty much like the spikes encountered when importing the FBX in UE4.
Reproduction steps: just import the FBX in Blender instead of UE4.