How do I change the Interpolate property on a rigidbody with Timeline?

Hello all,

During a cutscene I child my player to a vehicle and set the players rigidbody component to IsKinematic = true. This works with Timeline. However the player lags behind the vehicle severely and the only fix I see is to set the Interpolation to “None”. However when I set the Interpolation to “None” I get other issues during gameplay.

Now I wanted to animate the Interpolate property of the rigidbody and have it be None during the Cinematic and Interpolate after. However when I set the Animation Track to record then switch the Interpolate property to None, no new keyframe is inserted.

No I wanted to ask how is this possible? Or am I encountering a bug here?