Mechatronics (part mechanical, part electrical) engineer here!
I would guess that this is caused by “capacitive coupling” - a charge is transferred to the metal housing of the V. It’s actually more common than you’d expect for metal things, and (usually) harmless. While the metal can get a charge and feel a little “tingly” but almost no current will flow, and it’s current rather than voltage that does the real damage.
It happens because the charger isn’t grounded (the third pin you sometimes see on the plug) so the voltage of the housing can sort of float up because it’s not being held down by a ground pin.
Generally the tingliness from capacitive coupling is no more dangerous for you or your device than a slight static build-up. It’s annoying, but nothing to worry about.