I don't know if it's possible.
You can move the object directly with timeline, and it will follow the Bezier path. No need to use MoveTo behavior.
Thanks for the reply, dop2000 - more or less you have confirmed what I have found so far, however as I said in my post, my Sprite relies on MoveTo to determine movement angle, which sets the correct directional animation. So far I have not found a way to determine an object's movement trajectory and/or angle while using the Timeline to move it.
Unless I can find a way to check a Timeline object's moving angle on the fly, I might be out of luck.