CVT revving high in last "gear"

My vehicle listed above has recently started rev higher rpm's at around 60-65 mph when going into last gear. Curiously it does not do this when I use the “manual” mode, it will then “shift” through all the gears perfectly fine. Usually I would assume that it’s the overdrive but I’m not even sure that a CVT has an overdrive. Anyone have any idea what I’m dealing with here? I’m taking it in but I’d like to still hope that I might not have a transmission replacement on my hands.