std::future is set to 'empty' state c++

Question

The sr.tFuture is initialized with 'empty' state instead of 'pending' and I found out when I remove tFuture() from the constructor initialization list, the state of sr.tFuture becomes pending which is correct. But I don't quite understand the reason. Is it because the value of tFuture on the declaration part gets overwritten when tFuture() gets invoked and cause tFuture to not get associated with any promise?

struct SharedResource
{
    SharedResource(const SharedResource&) = delete;
    SharedResource& operator=(const SharedResource&) = delete;
    SharedResource() :
        tPromise(), tFuture()
        {}

    std::promise<void> tPromise;
    std::future<void> tFuture = tPromise.get_future();
};

int main()
{
    SharedResource sr;
}