Heading from Mammoth Lakes to Yosemite. Google takes the correct route via Tioga Pass (highway 120). Waze can't find a route...period.
There are two possibilities. First, there's a problem with Waze routing, where it doesn't like basically going all the way around the Valley to get inside it. Second, some part of the route is broken between the 395 and the Valley along Tioga Road -> Big Oak Flat Road -> El Portal Road -> Northside Drive.