Thread:Extension talk:WYSIWYG/IE11 with MW 1.22.0 + WYSIWYG extension: numbered and bulleted list empties document with save/reply (8)

But if Compatibility Mode is switched on by default, it should be switched off by the extension.

Does that solve Existing category definitions will be corrupted... too?

Support for IE11 was disabled by Wikia, so I think there are some other flaws, aren't there?