ElementComponent 'mousemove' event fires outside element when LMB is pressed

Description

Event 'mousemove' is invoked on ElementComponent, with useInput set to true, when mouse is outside the element but previously LMB was pressed inside this element. Works correctly on engine version 1.55.0.

• Browser: Chrome
• Sample project: https://playcanvas.com/project/996750/overview/elementmousemove
• Sample Code:

const TestMouse = pc.createScript('testMouse');
TestMouse.attributes.add('status', { type: 'entity' });
TestMouse.attributes.add('target', { type: 'entity' });

TestMouse.prototype.initialize = function() {
    this.isOver = false;
    this.targetElement = this.target?.element;
    if (!this.targetElement) return;

    this.targetElement.on('mouseenter', this.onEnter, this);
    this.targetElement.on('mouseleave', this.onLeave, this);
    this.targetElement.on('mousemove', this.onMove, this);
};
TestMouse.prototype.update = function() {
    this.status.element.text = 'Over UI: ' + this.isOver;
};
TestMouse.prototype.onEnter = function() {
    this.isOver = true;
};
TestMouse.prototype.onLeave = function() {
    this.isOver = false;
};
TestMouse.prototype.onMove = function() {
    this.isOver = true;
};

Steps to Reproduce

1. Go to: https://launch.playcanvas.com/1563175?debug=true
2. Press and hold LMB inside white rectangle and move mouse outside the rectangle
3. Text on top will still show that mouse is inside ui
4. Now go to: https://launch.playcanvas.com/1563175?debug=true&version=1.55.0 <- notice older version
5. Repeat step 2
6. Now event will work correctly, text on top will change to false

Run the linked reproduction project and compare the current behavior with engine version 1.55.0. Trace ElementComponent input handling for useInput=true while reproducing a held left-button drag from inside to outside the rectangle. Done means mousemove no longer fires outside the element and the sample's status changes to false.