Erg mode on Edge 540

I'm trying to follow a structured interval plan, but the resistance on the trainer drops after a few seconds on the Elite Suito and doesn't match the Edge 540. With the resistance set at 119w, it stays close to 90w, having to compensate by changing gears to stay at 119w.

I've already set the wheel size and gear ratio in the sensor settings, but I haven't had any success.

Can someone help me?