Ckeditor changes  tags to  tag Trying to get a button working in content item but ckeditor won't let me.

I tried pasting in source. But when toggling back and forth bewteen source and rich text editor the html changes.

Goes from:

&lt;button&gt;click&lt;/button&gt;


To 

&lt;p&gt;click&lt;/p&gt;


I've tried:

&lt;p&gt;&lt;button&gt;click&lt;/button&gt;&lt;/p&gt;


Not working either.

This never happened before, a settings thing?
For FILTER HTML go to:

/admin/config/content/formats/filtered_html

add &lt;button&gt; to the limit allowed HTML Tags list.

If you use FULL HTML the button should work.
If not try
go to:
/admin/config/content/ckeditor/edit/Advanced (for Filter HTML)
/admin/config/content/ckeditor/edit/Full (for Full HTML)
Then under Advanced Content Filter, select disabled.