Hello - I recently upgraded to apple Gen 4 just so I could use Zwift on the big screen. It worked great at first but now I’m having issues. The watt reading is very inaccurate, as is the RPM’s , there’s so much tension I can barely get through a warm up. I’ve deleted the app a few times and reinstalled and that hasn’t worked. I’ve also calibrated with tacx app. I got so frustrated this week I switched back to mini ipad and it was smooth sailing…however I still need to figure out the apple TV app, it’s the only reason I bought it. Any ideas??