Kickr core - Resistance issues

Hi all, hoping for some help :slight_smile:

Lately I experience resistance issues with my Kickr Core and Zwift. Like, if i go along a flat part, I can feel the resistance changing randomly from light to heavy. And, I can suddenly have light resistance in hills. So it feels that my trainer doesnt’t reflect the profile of the road at all.

I have updated both Zwift and my trainer through the Wahoo app. I have performed spindown through the Wahoo app.
See the settings in the picture, is something wrong here maybe?

had the same problem. seems to be an issue with the latest firmware. downgrading firmware solves it. meanwhile other software like rouvy is still running fine