JCE is not saving text when using Guru backend. It does save text using the front end. It saves text on Joomla articles so it is not a Joomla issue. You can test it here in the test course https://modernmysticlearningcenter.com/index.php/courses/guruPrograms/6-channeling/49-test-course.html
modernmysticlearningcenter Hi Have you tested the Editor of default Joomla template and see how it goes? As JCE is 3rd party extensions and you can report the problem to JCE support forum for its working issue.