Hello, I have been using Zwift with workout mode and Tacx Neo for past 6 months or so, without facing any issues.
This morning, when I used workout mode, the resistance was quite unstable. Every 40 seconds or so, resistance increased which was not accordance with workout mode. Sudden increase in resistance hurts my knee and I am unable to continue.
The only difference today was that I used different heart rate monitor. When I faced the bug, I went back to original heart rate monitor, but the issue was not solved.