To hight resistance using Zwift!!

[techmicky]

Hello everyone,
My Elite Direto gives strange situation when using Zwift workout. At some point, the unit resistant is so high that i have to stop pedalling to bring it back. Tried it many times, and always the same. I did the calibration. Could my unit be defective. How can i be sure it is Zwift and not my unit the problem.
showbox.bio/ tutuapp.uno/ vidmate.vet/