I had a few of these do this and Sometimes depending on the hours the throttle plates don’t close properly due to buildup in the throttle body bore and sometimes pulling it off and clean the bores solves the issue . You would think by it not closing the idle would hang but it doesn’t it due to the sensors giving false info to the Ecu . There also may be an update kit to help with this I don’t remember. Like the previous reply , if it’s under warranty take it in . They can also run the vin and see if it has other needs.
