Lumia maps issue?

One of the reasons I looked forward to moving to at&t and the Lumia was to be able to be on the phone while using the maps. Apparently there is a bug in the implementation of maps on the 920. Regardless of whether it was the Nokia maps or the Bing maps, I find that if I'm on the phone the phone will shut down and go into restart. Anyone else experience this? Other than this, this phone is totally boss.