Experiencing this problem in SIM mode.
Using Kickr Core, Macbook Pro, Bluetooth
I’m brand new to Zwift. Unboxed my Kickr Core and updated to the latest firmware (v1.1.1) Then downloaded a new installation of the Zwift app (9/21/2021).
Resistance on my trainer is working fine. I was able to connect to the Wahoo app, perform a spindown, and manually adjust the resistance settings. So I know my trainer is good.
The problem I’m having is syncing the resistance to my ride in Zwift. Bottom line: the resistance is inaccurate and seems to change on a whim. There’s no correlation between what grade I’m riding in Zwift and the resistance I feel on the bike.
I can be riding up a 20% grade comfortably in my big ring, and then grinding my lightest gear on the way back down. Sometimes I convince myself that the resistance is just lagging, but then other times I just think it has a mind of its own.
Super frustrating because it takes away from the immersive experience I was promised using Zwift.
Been poking around these forums in search of an answer. I’ve tried unpairing and deleting the Wahoo app (so that I’m only paired with Zwift), but that hasn’t worked. I’ve also tried reinstalling Zwift and restarting my trainer…both without luck.
Next step is to try running Zwift on my iPad Pro. And then maybe on my iPhone 12. Not sure if the issue has to do with the Bluetooth connection? Maybe I’ll go pick up an ANT+ dongle for the computer and give that a whirl.
Hope to get some feedback/resolution on this soon. Been excited to ride Zwift for a long time, but this issue is leaving me very disappointed thus far.