i dont know but maybe something to do with css 
i have noticed them values dont have anything in them 

I haven't really been able to track down the problem. For anyone curious, I'm trying to do this because I use the Articles plugin from iDragon and of course headings are important for articles and SEO, which Oxwall is natively bad at.

My current solution, instead of putting <h2> tags into articles. This can also be useful if you want to use it on the forums or blog plugin, it's the same concept.

$('p.heading').replaceWith(function() {
    return $('<h2>').addClass('heading').append($('<span>').text($(this).text()));
});

This will replace anything with like <p="heading">Header text here</p>, with the appropriate and semantic <h2="heading"><span>Header text here</span></h2>. Simply use that snippet in the Custom tail code textarea in the admin panel or in html_document.html.

cool

i have found if you use the html input popup thing to insert html into a textra you need insert if few time  ie keep refresh the page and add the html couple of times then it will finally take the html