Board Thread:General Discussion/@comment-32625436-20160620011305/@comment-27073024-20160620111326

Please check your settings again, and double check the editor names. There are three of them: What you are describing is the classic editor (the tabs). It is known to have very specific issues, and I wouldn't be surprised if what you're experiencing is one of those issues.
 * Wikia's VisualEditor
 * The Classic Rich-Text Editor (WYSIWYG)
 * The Source Editor

However, some wikis have the classic editor entirely disabled, while others disable it on a per-page basis. Which could also be the issue.

It's best if you switch to Wikia's new VisualEditor, or start learning about the Source Editor.

Cheers!