Kenworth '22 t680 auto trans started having an issue manual mode

Hello everyone
Recently my kenworth 2022 t680 automatic transmission started having an issue with the transmission the truck has only 420k miles. It mostly happened when I was going gear downshifted or upshifted in manual mode message popped up saying “stop driving or damage will accrue to the transmission” and Hill Hold Feature Unavailable same thing happened today when I tried to up shift from 11th gear in manual mode both times I had to pull of to the side turn off the truck and turn it back to and goes back to normal like nothing happened and transmission auto mode working perfectly I do plan to take to the dealer but in the meantime anybody had this issue or something similar
Thank you.