Current leaks while charging. Is the device defective? During charging(first charge), there is a vibration sense(on my fingers) with my moto x4's metallic sides. Is this shows that the device is defective? What may be the reason?
Issue: Tingly feeling on hands while touching metallic parts of device.

Test1: Firstly noticed at home during charging. Tried different sockets. [tingly feeling]

Test2: charged using usb with a laptop. [Worked Normal]

Test3: Connected at Office with UPS. [tingly feeling]

I have googled this, and everybody told it was normal(due to no earth pin for charger) and found one comment that, some chargers have capability of removing leak current, while they are connected in right manner. Then, I tried with plugging the pins in right order(its written Turbocharger on adapter which should be faced up ) the issue is solved.