a button with onPointerUpObservable need to be pressed two times

[assiomatica]

Describe the bug
I have a button:

var button1 = GUI.Button.CreateSimpleButton("but1", "Top");
button1.width = "150px";
button1.height = "40px";
button1.color = "white";
button1.cornerRadius = 20;
button1.background = "green";
button1.top = "10px";
button1.verticalAlignment = 'top';
button1.onPointerUpObservable.add(function () {
console.log("up");
// _this.flyToHome();
_this.camera.restoreState();
_this.camera.update();
});

  advancedTexture.addControl(button1);

the button must reset the camera position but if I need to press for some seconds to see the camera reset.
seems the action (restore the camera) it's interrupted and cannot be completed the first click

Minimally Reproducible Example

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. See error in (location [e.g. JavaScript Console])

Expected behavior
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Screenshots (optional)
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Environment (please complete the following information):

• Device: [e.g. Desktop or Smartphone]
• OS: [e.g. Windows]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Additional context
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