How to Clear Table Footer?

Hi,
I have some problem here. I cannot clear table footer.

Below are the steps to reproduce:

• I have a form which opens when I click Add or Edit. Let's call it FrmInput.

• Within FrmInput, I have a table with a footer.

• When I Click Edit, that form shows up detail data in the table as you can see in the screenshot attached (see scr-1.png).

• After I close the form, I click Add button which should opens the form in a clear state, but the table's footer still uncleared (see scr-2.png).

• I have tried ClearRows(), but it only clears the content - not the footer.

Any guidance?
Thank you verymuch.

Adi Prabowo