Table Dynamic Column Size

Hi folks. I have a table with several columns, and the dynamic calculation was going well until I define a column with an HTML Label, like this one:

String text = "<div style=\"width: 100%%; position: relative;\"><div style=\"position:absolute; left: 0; border-radius: 50%%; background-color: %s; width: 13px; height: 13px;\"></div> <div style=\"white-space: nowrap; overflow: hidden;position: absolute; left: 18px;\">%s</div></div>";
label = new Label(text, ContentMode.HTML);

Besides the label cotent is correctly displayed, the column size is not calculated, and its width is as low as column header.

I’ve attached an screenshot!

Thank you guys.