Hello Michael,

Thank you for posting in our community.

What I can suggest to ensure that the changes in the data source are reflected in the data source as well as in the grid is calling dataBind method after adding the row in the grid. For example:

 $("#removepersonbbutton").on("click", function () {
 $('#grid').igGridUpdating("addRow", personA);
 $("#grid").igGrid("dataBind");
 $("#removepersonabutton").attr("disabled", false);
});

I modified your sample and I am attaching it for your reference. Please have a look at this sample and let me know whether my suggestion helps you resolve the issue.

Looking forward to hearing from you.