why auto doesn't detect reference type of function

I made a class with method, which returns reference to member (not good encapsulation). I'm using auto for retuned funtion

class classA
{
    public:
    classA(classA & rhs)
    {
        cout<<"copy constr A"<<endl;
    };
    classA() = default;
};

class classB
{
    private:
    classA obA;
    public:
        classA& getRefA(){return obA;}
};

int main()
{
    classB obB;

    auto ob = obB.getRefA();
 }

The result is copy constr A

I understand that auto don't detect reference from function. Is auto detecting only the type without reference?