Solved: Android Auto wireless on 13 Ultra unstable?

Hi folks
I am a bit unhappy with Android Auto on my 13U, running on latest Xiaomi.EU weekly.

I am using AA wireless with a Fiat head unit.

Connecting works just fine, and then it works for some minutes before it disconnects, connecting again after a few seconds and so on....

Any ideas what I could do to fix this?

Thanks, cheers
Axel