Unfortunately this glitch or whatever you'd like to call it makes waze a bit unreliable during long road trips. Especially if you run into traffic and it doesn't suggest an alternate route because you are in between navigation segments. Plus I found it won't reroute properly if you just select alternate routes. You actually have to stop the navigation and re-navigate to your destination. I submitted a ticket through the support page, but the response I received was less than desirable. Basically making it sound like there was not a problem and shot it down.
MyTouch4G - T Mobile - Virtuous Affinity 2.05 - Android 2.3.5