When trying to upload grades, the Grading status is not updated to 'Graded'

Try the steps here to download excel 

https://docs.moodle.org/39/en/Using_Assignment#Download_the_Grading_Worksheet_to_record_grades

Then try to enter grades and feedback and upload the csv. Although the Final grade is populated, the grading status for the student and Grade column on the submissions page for the teacher remains unchanged.