this.state.description != ''

public/react/src/modules/courses/busyWork/NewWorkForm.js

@@ -323,7 +323,7 @@ class NewWorkForm extends Component{
 
     const courseId = this.state.course_id || this.props.match.params.coursesId ;    
     this.isEdit = this.isEdit || this.props.match.url.indexOf('/edit') != -1
-    if ((this.isEdit) && !this.state.description) {
+    if ((this.isEdit) && !this.state.description && this.state.description != '') {
       return ''
     } 
     const uploadProps = {