g_editor->get_text_as_r3table - not working second time around

I have created a table and each rown on the table has a button that will create long text field for notes.

I am using g_editor->get_text_as_r3table to retrieve data from the long-text field.  The first time processing, I am able to retrieve the data and save it.  The second time processing (for the next table row), the data is not retrieved.  I have attached a file with the code that I am using.