Problem with Control Rig when fix animation in sequencer

Hello, I have a character that has a loaded animation, and I would like to correct many movements. So I created a Control Rig and a Full Body IK (I set it up as Backwards Solve). Then I checked the “Bake to control rig” option in the Sequencer, but when I set the animation as “active”, the character becomes deformed… the control nodes twist the body instead of matching the loaded animation. I don’t know how to fix this.
I followed this tutorial: