When I export the CSV exel file with the NPS responses, the “completed_at” field is often empty.Why does this happen?This does not happen with the similar field “received_at”.Could you help me clear up this doubt?

Hi @User1594! Ebenezer here from Engineering Support👋.Are you able to confirm that the survey was completed by these users?This may need further investigation, could you write in with this issue and a member of the team will reach out to you.Thanks!