[Bug] `dropTargets` is empty in `location.current` on edge cases

[crabvk]

Hi. Thank you for the great library. Here's one bug I found:
I took the List example from the examples page and have added margin to the containerStyles object and the call to alert when target is not in the array to demonstrate the issue:

return monitorForElements({
      onDrop({ location, source }) {
        const target = location.current.dropTargets[0];
        if (!target) {
          alert("Here is the issue!"); // <=== Added this.
          return;
        }
// ...

Here's my demo:

demo.mp4