Join Date: Apr 2016
Location: Golden, Colorado
2017 Canyon V6 here, I've got a little over 6k miles on it (bought it at the end of February), and haven't seen anything like this on my truck.
I do know that some of the symptoms sound more like the way my truck acts in Auto 4WD mode. Sort of. I am sure you know to check, but it isn't the 4WD knob in the wrong mode, is it?
On McCoy's point, I think I know what you are talking about. Sometimes I floor it to pass someone going up the mountain to my house (at 7000 ft above sea level) and it drops down a gear, but could go at least another, then finally it decides that it can and drops down one more gear to give me the power to pass up hill. There's a huge delay between pedal to the floor (past the kickdown notch) and the trans shifting into the correct gear. It's annoying, but I think it was programmed as maybe something of a safety feature to prevent people from flying into the car in front of them.