My commute to work is around 42 miles round trip on a 75mph freeway and my average fuel economy is 36.1 mpg. When I drive in town I can get over 50 mpg while driving but the highway I take every day really skews the average. I will say though the window sticker for my hybrid said the combined...
Are you listening to the radio or are you utilizing Android Auto/Apple CarPlay? If you are using the latter I would check your cable first and make sure your phone isn't disconnecting every time you hit a bump. Lower quality cables can be temperamental.