I would guess maybe too much light. Can you tell us more about your setup? What kind of light are the cuttings under and how close are they to it? It looks like they're eating themselves very quickly, which is why I say it looks like too much light; they're trying to grow and have very little ability to uptake nutrients so they self-cannibalize.

Are you misting the clones or the dome? If you mist the clones, you risk mold, fungus, and loss of nutrients.

You might also consider trimming the leaves. Cut the fingers all down to about an inch or so. This will help with moisture-loss and wilting.