2021 Honda CR-V Hybrid fuel system problems

Vehicle is advertised at "36-40mpg" (36 highway, 40mpg city). I am averaging (AT BEST) 25mpg. I reported the issue to Honda Corporate and they advised I take it in to a dealer. I took the vehicle into the dealer I purchased the car from and was told "we drove it around for a few minutes and everything is fine with it." The dealer advised there was "no problem" and "nothing they could do.

On January 15th while driving home with my son I attempted to accelerate around a truck when I hit approximately 60 mph the vehicle stopped accelerating and began to slow down. I did notice that the "charge bar" for the hybrid battery was indicating that it was charging. The car continued to decelerate and I pulled to the side of the road. The check engine light was flashing. I turned the vehicle off for a minute and started it back up. The car drove fine and I was able to make it home.