jQuery Checkbox Event Handler Bug

I have recently discovered an issue that I can't seem to figure out regarding jQuery and checkbox event handling.

What should happen is:

• Click a box-image thats associated with a specific checkbox.
• When the box-image is marked as checked (denoted by adding a class of .checked and displaying top right corner checkmark indicator) the associated checkbox should also be checked.

When I repeatedly/quickly click on the gray box-image tiles you'll see the bug in question. The default behavior (toggling the checked attribute) appears to randomly take place after the event handlers fire. As a result this cause the associated selected box-image and checkbox to randomly unsync with one another, thereby giving inaccurate data.

Please view this example and bug in action by going to http://ift.tt/1F1QUu8

Do you have a solution to fix this problem either in jQuery or plain JavaScript?

Here is the code in question:

HTML:

<div class="container">
<div class="row">
    <div class="col-sm-6">
        <div class="form-group hwl-inline-checkbox-group">
            <label class="checkbox-inline">
                <div id="sa-checkbox-img1" class="sa-checkbox-img">
                    <i class="fa fa-check"></i>
                    <i class="fa fa-briefcase fa-3x"></i>
                    <label class="icon-img-label">WORK</label>
                </div>
                <input type="checkbox" id="imgCheck1" name="surrounding_area" class="sa-checkbox" value="work" />
            </label>

            <label class="checkbox-inline">
                <div id="sa-checkbox-img2" class="sa-checkbox-img">
                    <i class="fa fa-check"></i>
                    <i class="fa fa-building fa-3x"></i>
                    <label class="icon-img-label">SCHOOL</label>
                </div>
                <input type="checkbox" id="imgCheck2" name="surrounding_area" class="sa-checkbox" value="school" />
            </label>

            <label class="checkbox-inline">
                <div id="sa-checkbox-img3" class="sa-checkbox-img">
                    <i class="fa fa-check"></i>
                    <i class="fa fa-meh-o fa-3x"></i>
                    <label class="icon-img-label">NO PREFERENCE</label>
                </div>
                <input type="checkbox" id="imgCheck3" name="surrounding_area" class="sa-checkbox" value="no preference" />
            </label>
        </div>

    </div>
</div>
<!-- end .row -->

jQuery

$('.sa-checkbox-img').click(function(){
    var $this = $(this),
        sa_checkbox = $this.find($('.sa-checkbox'));

    if( !$this.hasClass('checked')){
        $this.addClass('checked');
        sa_checkbox.prop('checked', true);
    } else {
        $this.removeClass('checked');
        sa_checkbox.prop('checked', false);
    }
});

CSS

.container,
.row {
    margin-top: 20px;
}

h5 {
    text-align: center;
}

.sa-checkbox-img {
  color: #999;
  border: 5px solid #999;
  padding: 10px 25px;
  text-align: center;
  -moz-border-radius: 10px;
  -webkit-border-radius: 10px;
  border-radius: 10px;
  -moz-transition-duration: 250ms;
  -o-transition-duration: 250ms;
  -webkit-transition-duration: 250ms;
  transition-duration: 250ms;
  -moz-transition-property: all;
  -o-transition-property: all;
  -webkit-transition-property: all;
  transition-property: all;
}

.sa-checkbox-img label.icon-img-label {
  display: block;
}

.sa-checkbox-img i.fa.fa-check {
  display: none;
  color: white;
}

.sa-checkbox-img:hover {
  border-color: #009fd4;
  color: #009fd4;
  cursor: default;
}

.sa-checkbox-img.checked {
  border-color: #009fd4;
  color: #009fd4;
  cursor: default;
}

.sa-checkbox-img.checked i.fa.fa-check {
  display: block;
  background: #009fd4;
  position: absolute;
  top: -5px;
  right: -5px;
  color: white;
  padding: 5px;
  -moz-border-radius: 5px;
  -webkit-border-radius: 5px;
  border-radius: 5px;
}