Supplier Bank Accounts

I have a question: Why in the bank account of a supplier, at the beginning the account number created on 2023 was not shown in the list of bank accounts that you see in the image. This generated a confusion and the account number was created again but the system indicated that it already existed. After analysis, the bank account was “hidden” and could only be located by the Search button and adding that account to the list of bank accounts. Why did this happen?