Back button not called when tooltip visible

[stargazing-dino]

I think this occurs when you use the default AppBar(). This creates a back button that has a maybePop() call when a back it triggered. The maybePop likely sees the overlays and sends a false back.

One workaround I've found is to replace the skrim's default gestureDetector

Widget _createSkrim() {
  return GestureDetector(
    key: skrimKey,
    behavior: HitTestBehavior.translucent,
    onTap: _hideTooltip,
  );
}

with a

Widget _createSkrim() {
  return Listener(
    key: skrimKey,
    behavior: HitTestBehavior.translucent,
    onPointerDown: (_) => _hideTooltip(),
  );
}

But this creates the weird case where when you're dragging, the tooltip is immediately closed because an onPointerDown event was sent.

Listener
https://user-images.githubusercontent.com/29642168/135305144-46ed33e3-49ee-4659-98ac-2f2a879283e0.mp4

GestureDetector
https://user-images.githubusercontent.com/29642168/135305163-17499af7-85cc-4c98-8dac-2e8193eb50bf.mp4