Hello,
Up until August I alway trained with a Tacx Vortex and never had any problems with Zwift. A few weeks ago I bought a new Tacx Flux T2980. Earlier this week I wanted to do my first test ride with Zwift. What I first noticed is that the power is much more ‘jumpy’ than on my old Vortex when using ERG mode. A little deviation from my cadence and the power spikes are drop more than 50%. With my old Vortex the Tacx adapted a lot quicker in ERG mode. But this wasn’t the biggest problem.
In test ride I had to warm up for 5 minutes (150W to 300W, I think). After that I had to do 450W for 1 minutes. When I kept pedaling at the same cadence, the power was going up to about 350W and not any further. When I increased my cadence to 105-115 the power when to 430W or so, but after that it dropped again to 350W.
First I thought it might be because I use a new desktop PC. So, I tried again with my old laptop (which was working fine with the Vortex). But again I had the same problem. So my guess is that it’s not my PC that is not working okay.
I even tried with my laptop 10 centimers from the Tacx to make sure there are now connectivety issues. I use ANT+, but I also bought a Bluetooth dongle to test with bluetooth on my desktop pc. It didn’t help.
Oh, and calibrated the Tacx with the Tacx app. And checked for updates, but I had the latest version.
This is what happens on Zwift:
This is what happens when using the Tacx app:
Do you guys know of any bugs that cause this problem described above? It’s very frustrating that the new upgraded Tacx doesn’t work. I was hoping for Plug&Play. I invested a lot of money for better equipment and some more comfort, but this is increasing my stress levels 
If anyone has any tips to get rid of my problem, I would love to hear them.
Auke
