While checking the dramas/movies/TV shows from 2021, I discovered that the ones that had the Release Date set to the year 2021 only got their Status automatically changed to Airing/Released even though they haven't aired yet. Even if you change the Status to Announced/Not Yet Aired/Not Yet Released, the system changes it automatically back to Airing. Checked for 2020 and the same issue happened.
This might be one of the issues why users can rate some of the dramas/movies that haven't aired yet. Please look into it.
Thank you!