Component becomes disabled when scene starts

I’ve been following this VR fruit ninja tutorial and am having some problems. The problem I’m having at the moment is that when the scene starts, the Weapontrail component on the katana un-ticks itself. With the scene running I can tick it again and it works as expected. Then if I stop the scene and re-start it the same issue occurs.

What am I missing?

Without further information we can’t tell you what is causing this problem but you sure can go around it with including a GameObject.SetActive(true) on the right position in your code.