CharacterController.Move makes transform position (NaN, NaN, NaN) on win platform

I use CharacterController.Move in FixedUpdate of a model, the motion vector is calculated with some spec rules. The motion vector itself is not NaN, and before Move the position is right. But after Move it becomes NaN.

My script is some like :

Code (CSharp):

1. motion = calc_motion();
2. pos1 = playercc.transform.position;
3. playercc.Move(motion);
4. pos2 = playercc.transform.position;

And I catch some logs like :

model move invalid : (0.1, 0.0, -0.1) (NaN, NaN, NaN) (9.4, 0.0, -0.2) (NaN, NaN, NaN)

1st vec is motion, 2nd is current position, 3rd is pos1, 4th is pos2.

Unity version is 2017.4.3. Seems like this only happens on Windows, not on iOS nor on Android.

 

Still exists in version 2017.4.12f1

 

So nobody ever had this problem? Clearly it's a bug.

 

weird... i have 2018.2.10 and i use also CC with move(). and i dont see any NaN values.

 

It happens in some conditions, maybe get stuck with some colliders? But I can not find the rule, and in my logs i haven't find any "strange" positions cause this.