FTP builder training plan - resistance

Hi all,
I‘m currently doing the FTP builder training plan.
Today in week 3 „threshold development“ training I received no change of power from my Tacx Flux. With every interval change I had to change gears to match watt power and cadence target.

Is that normal, or did my Tacx or Zwift fail for the first time?

Thx for feedback!

Hey Achim, sorry to hear that! Were you feeling resistance from the gradients? Did you try toggling on ERG mode?

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