Understanding F04257W2 (Payments Window Worktable) usage

Hi all,

I would like to understand de usage of the table F04257W2 (Payments Window Worktable) in the payment process, because as the table description says, it is a worktable. As far as I understand, this tabla should be populated with the payment information I am processing, and then dissappear when the payment is completely processed.

The thing we are watching is that, in some cases, once we process the payment, a register with the control group number (HDC) still remains in that table:

That is why I would like to know if this is correct or not since our cliente, after a couple of years, they have this table with 37.500 registers and we think this might be the reason why the payment process takes too long to finish (Write and Update actions).