I had this same problem with mine. I'd find myself moving as far away from my car as possible then locking it otherwise I'd get passers by looking at me lol
Apparently it is a common fault with K12 which has now been rectified, mine was done under warranty and they didn't bat an eyelid when I mentioned it only that I'm not the 1st.
I'd speak with your local dealer or customer service, if its a common fault, why should you have to pay???