Yeah, this is an easy one...
At 0:08 ZAR inserts himself into the picture. That's fine, but you get what you get there. He gets pushed, but not at all violently into the back of the net. There's nothing there for anyone. So far, I don't have a penalty anywhere. Nothing has happened. At 0:14, Hagg comes down with malintent through ZAR while he's on the back of the net. I can see that from above, but the ref that was nearby had gone to the back of the fray and didn't see that. If I only caught that out of the corner of my eye, I'd probably have Hagg for a rough there.
Now, at 0:19 this should start to dissipate. There are two refs standing on the net. That's when ZAR starts to have his wires cross. He takes Hagg's helmet off and then sends a jab right to his face. And that's that...it's not about "code" or any other nimby boy nonsense that you're upset about...there's two penalties there on ZAR and one on Hagg. The one on Hagg wasn't seen, they gave ZAR a routine discount on the two, and no matter how you slice it, he gets the extra two there...of all the places to complain about officiating, this one is all sour grapes...