Same problem here.
It's such a shame this was not mentioned in any review whatsoever.
This is not that we have a faulty unit, this is every unit has the static left noise. It's a production problem.
Still the sound is great overall but this really needs to be addressed, it's quite annoying. I wonder who in Corsair tested this headset, probably they were having a bad day.
I think after force updating the firmware it got somewhat better though. But needs to be fully solved.