My e-tron has this problem; sometimes being in a field, sometimes thinking it had gone back home to Ingolstadt!! It's currently in Brighton Audi, where a faulty aerial has been diagnosed and a replacement is being fitted (after painting). I should have it back tomorrow!
The good news is that...
Here's our 'new' A3 e-tron. For the amount we saved I'm happy with it already having covered 6k miles - bar the lack of adaptive cruise it has everything I'd have ordered :)
Didn't manage to get any free electricity though :p