Regarding static orientation

[mydayz]

Hi
Tried with the scene you send but couldn't reproduce the issue. Can you please send me a scene with the exact settings that trigger the error?
Thanks

I've attached error scene.

And one more question, 

as you see, when I use Curvy generator which I made, my scene file size is more than 100 MB. It is very huge for SCM like Git.
Isn't it a problem?

I've tested something then I guess longer path length gets bigger scene file size.
The optimize is enabled, the file size gets smaller.
Maybe the vertices info size gets smaller with the optimize option.

However, I loose the orientation control without the optimize option.

Is there any solution for this?