Wrong number of active_wait_requests after "cancel" connection

[smiera]

If I add check for active_wait_requests in this test:
src/conn/pool/mod.rs

    #[tokio::test]
    async fn should_remove_waker_of_cancelled_task() {
        let pool = pool_with_one_connection();
        let only_conn = pool.get_conn().await.unwrap();

        let join_handle = tokio::spawn(timeout(Duration::from_secs(1), pool.get_conn()));

        sleep(Duration::from_secs(2)).await;

        match join_handle.await.unwrap() {
            Err(_elapsed) => (),
            _ => panic!("unexpected Ok()"),
        }
        drop(only_conn);

        assert_eq!(0, pool.inner.exchange.lock().unwrap().waiting.queue.len());
        assert_eq!(0, pool.metrics().active_wait_requests.load(Ordering::Relaxed)); // <---- NEW CHECK
    }

then i get error

thread 'conn::pool::test::should_remove_waker_of_cancelled_task' panicked at src/conn/pool/mod.rs:1015:9:
assertion `left == right` failed
  left: 0
 right: 1

I even try to add sleep

sleep(Duration::from_secs(10)).await;
assert_eq!(0, pool.metrics().active_wait_requests.load(Ordering::Relaxed));

same error.

How I understand, for this "canceled" task, function poll_new_conn called twice and .active_wait_requests.fetch_add(1, atomic::Ordering::Relaxed); called twice too.
First here: conn/pool/mod.rs:425. Second here: conn/pool/mod.rs:343

P.S. it will be great, if PoolOpts has function with_acquire_timeout(timeout: Option<Duration>) and "cancel" pool.get_conn() if provided.