Unwanted Rotation of camera during transition

Hi, im working on the transition between two cinemachine freeLookCamera.

I made one freeLookCamera and duplicated it and only changed the cameraOffset X value.
So they’re exactly same but the offset X value.

When i make transition between them, i expect only horizontal movement of camera, but they also move slightly down.

I don’t know why this happened, can someone help me up?

https://drive.google.com/file/d/1Yce_SFN5ePVE1sFd5SP3sDydl6GdsU9A/view?usp=sharing

Can you show the FreeLook inspector? Which cameraOffset X setting did you change? There are several.