When using Shockblade Zed and you taunt, his shadow will appear and everything is good until he "kills" the shadow. The shadow will fall to the ground and just disappear rather than turning into smoke. It still makes the sound effect of turning into smoke, but it doesn't "poof." Maybe this is intentional, but I doubt it because his shadow behaves normally with everything else.
1. Begin game as Shockblade Zed
2. Use your taunt.
3. Shadow will fail to "poof."
This happens 100% of the time for me.