Clone TinyMCE?

Question

JavaScript

Hello.
I have this markup for displaying a form in job.tpl

<?php foreach($vacancies as $key_vacancy => $vacancy): ?>
                    <div class="field-group">
                        <a href="#" class="buttonGray buttonRight deleteVacancy">Delete Vacancy</a>
                        <div class="form-group">
                            <label class="col-sm-2 control-label" for="input-title"><?php echo $entry_title; ?></label>
                            <div class="col-sm-10">
                                <input type="text" name="vacancy[<?php echo $key_vacancy; ?>][title]" value="<?php echo $vacancy['title']; ?>" placeholder="<?php echo $entry_title; ?>" id="input-title" class="form-control" />
                            </div>
                        </div>
                        <div class="form-group">
                            <label class="col-sm-2 control-label" for="input-supervisor"><?php echo $entry_supervisor; ?></label>
                            <div class="col-sm-10">
                                <input type="text" name="vacancy[<?php echo $key_vacancy; ?>][supervisor]" value="<?php echo $vacancy['supervisor']; ?>" placeholder="<?php echo $entry_supervisor; ?>" id="input-supervisor" class="form-control" />
                            </div>
                        </div>
                        <div class="form-group">
                            <label class="col-sm-2 control-label" for="input-duties"><?php echo $entry_duties; ?></label>
                            <div class="col-sm-10">
                                <textarea name="vacancy[<?php echo $key_vacancy; ?>][duties]" placeholder="<?php echo $entry_duties; ?>" id="input-duties" class="form-control"><?php echo $vacancy['duties']; ?></textarea>
                            </div>
                        </div>
                        <div class="form-group">
                            <label class="col-sm-2 control-label" for="input-requirements"><?php echo $entry_requirements; ?></label>
                            <div class="col-sm-10">
                                <textarea name="vacancy[<?php echo $key_vacancy; ?>][requirements]" placeholder="<?php echo $entry_requirements; ?>" id="input-requirements" class="form-control"><?php echo $vacancy['requirements']; ?></textarea>
                            </div>
                        </div>
                    </div>
<?php endoreach; ?>

This is where js is included.

<script src="//cloud.tinymce.com/stable/tinymce.min.js"></script>
    <script>tinymce.init({ selector:'textarea' });</script>
    <script type="text/javascript" src="view/javascript/repeat-fields.js"></script>

The contents of the repeat-fields.js file to clone:

var attrs = ['name'];
function resetAttributeNames(section) {
    var tags = section.find('input, textarea'), idx = section.index();
    tags.each(function() {
        var $this = $(this);
        $.each(attrs, function(i, attr) {
            var attr_val = $this.attr(attr);
            if (attr_val) {
                $this.attr(attr, attr_val.replace(/\[(\d+)\]/,'['+ idx +']'));
            }
        })
    });
}

$('.addVacancy').click(function(e){
    e.preventDefault();
    var lastRepeatingGroup = $('.field-group').last();
    var cloned = lastRepeatingGroup.clone(true);
    $('input[type="text"]', cloned).val("");
    cloned.insertAfter(lastRepeatingGroup);
    resetAttributeNames(cloned);
});

When cloning, TinyMCE appears, but I can't edit anything.
Please tell me how to properly clone TinyMCE.
Thanks in advance.