I have a 2010 ES350. Original nav was never updated. Recently had Lexus dealer install lastest version 16. Now it displays only 50% of street names when in a neighbourhood. Street is on, but many without names. Dealer says this is Lexus newer format for updates. Street name pops up when you are on the street?? Pointless. Because once I am on that street, the street signs tell me I am on the street. Don't need nav to tell me that. Anyone experience this problem?