my vr scene changes after build process

Hey, I got a really weird problem here using VRTK on Unity 2017.4.10

I made a szene in Unity with the VRTK package.



I am using a custom collider and placed it into VRTK Script under the body collider in the custom settings.



When I test it in unity editor it works fine. Here is how it looks like when I use the Simulator.



It looks similar when I switch to steamVRsdk.

Now comes the weird part:
After I build the scene smth goes wrong for some reason. It changes the VRTK setup during the build process and I dont know why! Before I build when I play my scene the VRTK generates my custom body collider and names it [VRTK][AUTOGEN][BodyColliderContainer] like in the simulator image. Its located under the [CameraRig] Object.

After the build I can see the scene has been slightly modified and when I play it again the Custom BodyCollider does not get generated anymore. It generates a HeadsetCollider [VRTK][AUTOGEN][HeadsetColliderContainer] under Camera (eye) though but I dont know if this would be generated anyway. The build itself ends up having no body collider either when using the VR. But when I use the simulator everything works as intended.

Now I have to close unity, restart it and reload the projekt. After that everything is like before and works. Even when I save up the changes it made itself after the build process, when I restart the program it still works again.

My problem here is that I use the custom body collider for my collision detection. I tagged it as a player and when ever a car hits the player smth gets triggered like a crash animation.

My workaround for now is to just add two body collider. One via VRTKScripts and one on the [CameraRig] itself. And its funny because after the first build one of them disappears, after a second build the other one disappears as well.

Any ideas?