earthquake connect with npc (probably players) "bug"

I don't think the spell is working properly in my opinion, when you are casting and the skeleton for example is in range it will already connect even when the mob is running through it. So while it's not standing in the aoe range anymore it will still take the full damage of the spell.

For example an archer will start kiting and it will take the damage anyhow while it's not even remotely close to the spells range.

Hope i explained it in a proper way

 

This is probably just a lag issue.