On Oculus Quest, the mousedown event seems to fire twice.
  I think this is somehow related to 

  - https://github.com/aframevr/aframe/issues/3297
  - https://github.com/aframevr/aframe/issues/4141



Here is a <a href="working.html">working</a>
and a
<a href="notworking.html">not working</a>
demo.

Before entering VR the button cube changes the state, but after that it doesn't since the function is executed twice.

A workaround seems to be to delay another execution like so:
```
if (this.waiting) {
  console.log("sorry, no ...");
  return;
}
          this.waiting = true;
setTimeout(() => {
  this.waiting = false;
  console.log("reset ...");
}, 100);

```



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