Prestashop 1.6.x deletes 'background-size' css property in source HTML.

[Andypshop]

Prestashop 1.6.1.18 tinyMCE editor removes some css inline properties from HTML source code in product description.

No matter if it is short or long description, custom theme or default-bootstrap theme?

For instance while saveing product description property "background-size: auto 100%; " is deleted from HTML source code.

Could someone possibly tell me why?!!

Is there validation process that deletes css property ?

There is example here ( having saved HTML code I have lost "background-size" property) :

<!-- Input HTML: -->
<div style=" margin: 0 0 18px 0;
            background-image: url('Thumb-Orange.jpg');
            background-repeat: no-repeat;
            background-position: left top;
            background-size: auto 100%;
            padding: 35px 30px 35px 20px;
            font-family: georgia, palatino;
            font-style: italic;
            letter-spacing: 4px;">
  <p>description</p>
  <ul>
  <li>feature no1</li>
  </ul>
</div>

<!-- Output HTML: -->
<div style=" margin:0 0 18px 0;
            background-image:url(&quot;Thumb-Orange.jpg&quot;);
            background-repeat:no-repeat;
            background-position:left top;
            padding:35px 30px 35px 20px;
            font-family:georgia, palatino;
            font-style:italic;
            letter-spacing:4px;">
  <p>description</p>
  <ul>
  <li>feature no1</li>
  </ul>
</div>

 

- Input: -->

a