Wierd problem when reloading scene, public gameobject does not get assigned...

I have "master game controller" where i assign the player as a public gameobject and everything workes fine, but when the player dies and presses the "play again" button (runs : SceneManager.LoadScene(0, LoadSceneMode.Single); ).

The pubic gameobject does not gets set and leaves empty and that creates all kinds of problems and errors.... what im i missing?

When i start the game normaly

And after i have pressed the play again button