Nope. Aerial installed on the nearside (left) of RHD vehicles. You may have either a poor connection causing arcing on the rear demister circuit, or if any part of it is used as an antenna then DC is getting where it shouldn't. There should be a DC choke to ensure that only AC radio signals get to the receiver(s) and not the supply volts which are DC of course. It's usually some form of capacitor, or capacitive circuit.

One other thought is a bad track on the demister may be causing an issue. Any sign of 'hot spots', which show up as uneven demisting? Could be a source of 'noise' in poor signal areas.

__________________
Me:
Current: 2011 E71 40D Vermilion Red/Beige Nappa

Wifey:
Current: 2012 R80 Countryman SDX Green/Cream