In several sites I've noticed that the Styles no longer show in the WYSIWYG Editor. You can still pick the styles, but you don't know what is picked when viewing unless checking the HTML.

Tonight I noticed when working on a site that there is no HMTL to view in the WYSIWYG editor. I'm using the most updated version of 5.6 on the site.

Any ideas why it would disappear and how to fix this? It really makes it hard to troubleshoot.

Thanks.