Journal Entry - Debit or Credit column has automatic disappeared

Dear all

I have an issue when dealing with the Journal Entry.

When I copied a journal and tried to edit the column (Debit or Credit).

The Debit or Credit column has automatic disappeared.

For example:

When I edit the Debit or Credit column from number 1 to number 13, the number 5 Debit or Credit is disappeared.

Does anyone has the same problem as me?

If any has the same ideas, please help me.

Thanks a lot.