Section plane animation problem

I have a problem with implementing a scene animation using Section planes.
Here is what I want and what I am getting: Sketchup Section planes problem - YouTube
I want my structure to appear from the ground up. I use a section plane for that.
The problem is that the scene first shows the complete structure, then gradually hides it and only then it appears from the ground up. How do I get rid of the first part there?
Thank you in advance.

i haven’t downloaded the file but looking at the animation you may need to move the 2nd scene tab over to the left by one. right click it and choose move left ??

Not Sure but this video might help. You need to create a section plane for each scene, and activate the appropriate section plane in each scene.