I have a problem with adding an iframe to a paragraph.
In Text formats and editors, I have checked "Limit allowed HTML-tags" and then added
<iframe> to allowed tags.
But when adding an iframe tag with attributes to the CKEditor, all attributes are removed and only the tag is remaining.
When I uncheck "Limit allowed HTML-tags", the iframe is shown as expected but I do want to restrict HTML tags.
Is this a bug or am I adding the tag wrong?