BUG:
I have avoid tool roads enabled.
I choose the 2nd itinerary to my destination (the one including Toll roads), everything worked fine.
During navigation the system rerouted me while I was driving at high speed on the highway in a point where a local road is passing below the freeway.
A second after this everything was back to the normal navigation, ETA was ok but I had 2 purple directions drew on the map (the actual one and the one I think Waze commuted on that instant).
They remained for all the navigation till destination.
Android 4.0.4
Logs sent at 20:17 CEST



