How to use the action option delete line in Edit Invoice section Invoice Line?

Summary:

We have in the past used the action option of deleting an event invoice line. Recently we have not been able to use and have had to develop a workaround which is time consuming and cumbersome.

Content (please ensure you mask any confidential information):

In the past we were able to select in the screen Edit Invoice section Invoice Lines, an invoice line and go to Actions and select the option 'Delete Line'.

The system would eliminate the line from the invoice.

Now, the system will display the warning window

If you click the OK button. But when you retrieve the invoice, the line will continue to appear, even though the total will be adjusted. The invoice will continue to display, in this case the three invoice lines.