Mine does the same thing. All other gears are super smooth! It's not that bad but you feel it sometimes. Nice truck OP, Enjoy ;) Sent from my SM-G950W using Tapatalk
Had the same issue on my 2020 LT TB.
Took it in, they saw the problem, told me we're ordering a part, 1 week later they changed it and it's brand new.
Part number is 84800777
Hopefully this help others.