C++ pointer to object, can't read variables after 'return;'

In my Chamber class I set the nextChamber to a pointer that points to another Chamber when the user wants to move.

I do that with the following code:

nextChamber = &(layer->findChamber(x2, y2));

In Chamber.h I have:

Chamber* nextChamber;

with nextChamber being a Chamber* and layer being a DungeonLayer*. findChamber returns a Chamber object so that's why the &(). But I think something is going wrong here.

When I break on this point it sets the nextChamber variable nicely and I can see it's the right one (I use visual studio).

Proof:

But after this it goes to the function above and return; that void function because the user is not allowed to make another choice because you are in a new Chamber and it has to initialize again.

The above happens to nextChamber but that's the only variable that changed, the others are still acting normally.

Can someone explain what is going on?

Code snippets:

//Function
    if (enemy != NULL) {
        std::cout << "flight" << std::endl;
        moveToChamber(); //this method contains the setNextChamber
        return; //after this, nextChamber is altered to the 'null'-state
    }
//endfunction


void Chamber::moveToChamber() {
    ........initialisation of the varialbles and a switch.........

    nextChamber = &(layer->findChamber(x2, y2));
    };