Cadence out of control

Anytime I get to 96rpm or above, which is my typical cadence (95-100rpm), no matter the power output, the app immediately shows me 120+ rpm. This will only change if I drop my cadence to below 90rpm.

Wahoo Kickr Core is the trainer.
My wife beside me has the same trainer, and her cadence is typically under 90rpm, no issues.

Thoughts?