Server side behaviour for setting description field will no longer work when Rich Text Editor is disabled.
- Go to Administration > System > Rich text editor, and disable it for all users
- Create behaviour with server side initialization script to set default value of description field (https://scriptrunner.adaptavist.com/5.6.7/jira/behaviours-overview.html#_setting_a_default_description)
- Save behaviour
- Add it to all projects and all issue types
- Go to create issue
- Description field is empty, but it should be set to default value by Behaviours