07 A3 2.0 - NAV freezes
 

Anyone experience this before? I'll take it in under warranty, but it's strange. Maybe 4 times n the past 6 months but happening more often. The whole NAV will freeze while I am trying to input an address, radio and volume still function but that's it. I have to turn off the car for a certain period(not just off then on) and it has reset every time to work...