Hasebe/Library/PackageCache/com.unity.cinemachine@1b8d58983403/Documentation~/KnownIssues.md

Known Issues

Accumulation Buffer Projection Matrix

If accumulation's "Anti-aliasing" option is enabled and the scene contains a Cinemachine camera cut, the camera's FOV will be incorrect after the cut. Workaround: Reset the projection matrix every frame, after CinemachineBrain has modified the camera.

public class FixProjection : MonoBehaviour
{
    void LateUpdate()
    {
        Camera.main.ResetProjectionMatrix();
    }
}