Had the same thing happen several times heading east on I-90 in South Dakota we were 300 miles from our destination and Waze suggested many times that we exit the highway and then immediately get back on (i.e. take the exit and then continue directly across the road crossing the highway to the on ramp for the highway we had just left.
This occurred in the middle of nowhere with no construction and no large town within many miles.
P.S. Mt. Rushmore and Custer state park are well worth the trip