Not sure what traffic trends is. I searched through many settings and found a map layer called traffic. Is this what you mean?
While in the map layer setting, I unclicked traffic and custom maps. I also have no idea what custom maps is.
Settings/Navigation/Calculation Mode is not set to offroad. Both Base Camp and the 595 are set to Faster Time.
I also checked, both Base Camp & the 595 are set to the motorcycling activity. Both are using the same version of maps. The route I was trying to follow, by click the route in the bottom right box then the Route Options tab just for that specific route, is also set to motorcycling.