That's the first I've heard of that issue. I would start by confirming clean contacts on both ends and re-trying. Otherwise, all you can really do is hope the dealer resolves it. Headunit issues have already plagued the new headunit featured in the 5th generation Impreza due to an electrical issue, which yours is not directly related to.
"Why would I want to profess my feelings for some 3D girl?" - Tomoya Aki from the anime Saekano