Alright folks, I've finally found the solution to this.
I bought the 7 to 5pin adapter but in hindsight the 7 to 7 may have been more versatile as my existing adapter could in theory work between trailer and bypass.
7 to 5pin (4 pin can plug in leaving the aux power unused)...
Having same issue, my 2016 had it as well but not nearly as persistent. Any luck with solution? would love to just turn it off, I know my trailer(s) lights are working I don't need the handholding by my truck especially with how unreliable it is with the false negatives.
It is! Im coming from a '16, i ran 275s for 4 years before putting 285s on... the 285 looks significantly better in my opinion. I will be putting them on my 21 when it lands.