Having issues with resistance using Kickr Snap, Apple TV 4K (1st gen with tvOS 15) and Zwift Companion app in Iphone 7 (iOS 14.8).
Issues have always been sporadic and intermittent since using ZC to bridge all BT connections to ATV. No change in resistance during uphills, downhills or training with ERG mode on, issues are fixed with a combination of closing ZC or turning BT off and on again or restarting app in ATV.
Since sept 20th, issues with ERG are permanently not responding to above fixes. Trainer resistance starts too high once route is started and wattage displayed on screen is higher than normal. No change in resistance during uphills, downhills or ERG training. Cannot complete spindown. Workaround to this issue is not using ZC and connecting directly to ATV. Downsides are not able to connect trainer, HR monitor and cadence sensor all at the same time (usually leave out cadence data or use an app to have it on the phone’s screen)
Bridging BT connections using ZC has always been shaky and outright laggy.
On older versions of ZC, it was much better having the flexibility to choose which BT connection to bridge using ZC, rather than having to bridge all connections using ZC.
Please return to having the ability to choose separately which BT connections to bridge to ATV when using ZC.
Best setup (for me) was having trainer connected directly to ATV BT (upside is instant ERG mode resistance changes and no ERG waffling) and having HR and cadence bridged using ZC on the same BT connection to ATV (these signals and data are not so sensitive to lag).
Hope I’m able to help having the issue fixed