Gaps between bones during physical animation

Hi there, I’ve got some physical animations that work really nicely with a skeletal mesh I’m using, everything flings around as I want it. The only problem seems to be that the hands often separate slightly from the arms, there’s a gap between them for a while until the animation blends back into a baked animation.

Is this from how the physics asset is set up it, or maybe the skeletal mesh hierarchy, or something else entirely?