ERG : just annoyance?

I have a setup with a Kickr core trainer ( have updatet firmware and done spindown with the Wahoo-app), running Zwift on a laptop with Win10. I have performed numerous calibrations with the Zwift app. But ERG does not work 4 out 5 sessions. And I can`t find any button to switch ERG mode off.
The trainer i brand new.
Luckily I have a Stages powermeter on my bike , so I can use that, and dismiss using ERG mode that way.
But why does not ERG mode work ?

Hi @Eyvind_Alnes

I think this is your issue.

see Wahoo KICKR reversed gradient [October 2021] - #27 by JP_Katenbrink