Option with add not working

@sjpadgett @stephenwaite
Hi fellows,
Can you point me to where the code is to fix this issue? I tested the current demo, and it has the same issue of being unable to add. But the development demo works. So, there is a fix somewhere. I searched the Issues on git for “with add” but found nothing.

Try library/options.inc.php around L-2475 and library/options_listadd.inc.php