Navigation glitch
 

We recently visited Niagara Falls, NY. The nav took us straight the hospital downtown without issue. We went out for dinner out near Sanborn with my wife's cousin and her family. When we left the restaurant to come back to Toronto, the nav came up with some route that was in excess of 1000 km (actual was something just over 125 km). I then asked it to get me to Niagara Falls, ON and it returned a route, of course, about 100 km less than the first route it gave me to Toronto. I never looked at the list of directions but I presume it must have been via Detroit! I gave up and asked it to take me back to the hospital, which it dutifully did. From there we went back to the bridge and once back on Canadian soil, the nav found "home" when asked, no problem. Has anyone else encountered this kind of glitch going over into the US?