Done NaN day after deadline

Hello, I set a timeline for our project, but when we mark it as ‘done’ days before the deadline, it shows the ‘!’ symbol. I understand that the '!" symbol usually appears only when you mark the task as 'done ’ overdue. Why is this happening, and how can I fix it?

Hey Rania! Can’t see the exclamation mark in this screenshot but do you happen to have any other status columns that may be linking to the date column in “deadline mode”?

Does this happen on all your items or just this one?

It might be worth getting in touch with our support team here to rule out any kind of bug creating this behavior.