Game Mechanics: Character not swinging, creature not taking damages

[McSkippy]

I am currently on my shaman Emeko in Lake of Ill Omen hunting, trying to get my level. This has occurred several times today. My character, anytime during combat, will begin to stand there, doing nothing. At the same time, the damage from my DoT, Affliction, is saying it's dealing damage, but the creatures health bar is not reflecting this. Unsure if it's lag, as I've logged several times, even restarted my PC several times. It's becoming frustrating and almost unplayable.