04pathse got a good idea there. So you may get & hookup a fuel pressure gauge, duct tape to windshield, and see if pressure falls at that speed. Replacing the filter - yes too, but could more like "fuel delivery" problem. Keep the pressure gauge in plain view in order to get to the bottom of this faster / more efficiently!
You'll want to eliminate the basics before the dreaded CVT issues - which begin by doing a pan drop, inspection & re-fill, expensive if you're not into that depth of DIY.
Keep in mind HEAT will cause 'systems' (ECM, TCM ,whatever) in these cars to do the Limp Mode thing. So a good coolant flush & refill w/PROPER ratio of distilled H2O helps in that respect. Hey it's SUMMER right
Hate to say, it's almost always come down to a CVT problem with these "THINGS"