I believe I have verified there is a bug on Apple TV where the trainer difficulty slider is not working correctly. When on max it is not applying correct resistance.
I have further verified this today by riding the same route on different devices. I have a Tacx Neo 2T with an 11-34 cassette. Today I rode the Richmond 2015 UCI Worlds Course. I had my Trainer difficulty set to max and I did not change it during this test.
I first rode on Apple TV using Zwift version 1.0.54684
I had the same issue that I created this thread about. Inclines are not requiring me to down shift. Even on the big inclines on the back half of the route I did the whole route in the same gear. Even jumps to 6 or 10 per cent inclines are not forcing me to change gears. I was on my big ring in front and on my fourth smallest(By size) ring in back.
I then Immediately rode on my iphone using Zwift version 1.0.53416
I have an older version of Zwift on my iphone because I never use it to do rides on. But on the same Richmond course, the trainer difficulty still on max…totally different. Trainer difficulty is working correctly. Even a 2 percent incline I can feel the resistance and then on the hills I had to shift all the way thru all my gears on my big front ring and then went to my smaller front ring and used up most of those rear gears. I could feel the resistance come on strongly as it should and then when I crested hills it released as it should and I had to go back to the big front ring and run up my gears.
So I do believe there is some kind of bug on the current Apple TV version…i don’t want to update my iphone version because I am afraid I would then possibly have the same problem on my iphone.
Maybe Zwift can look at my ride logs from today and find out anything?