My thinking is that since this tingling is sustained, I don't think this is capacitative coupling. This sounds like a voltage that can deliver a sustained current.
The fact that a user who bought off line does not have the problem, clinches the deal for me. His unit was not intended for India. In a country that is 110/220 center tapped, at a 220 volt outlet there is no neutral at the wall plug. That is the issue here. Sure the neutral is center tapped, but that is not anywhere to be found on the receptacle.
India is still a very corrupt country, with Bucksheesh still flowing like water. Due to the British Empire, Buchsheesh is in the British vernacular, but Americans do not usually understand the word. However somewhere along the line there has been Bucksheesh at the root of the OP's problem.