I have filed tickets on this, but the tech support staff had enormous difficulty even understanding what I meant. The firmware 1.1-19 is broken for ADAT sync. If you roll back to 1.1-08 it will work again. It is in Universal Control file named Universal_Control_3_1_1_54569. You have to run the installer twice because the first time just uninstalls when rolling back. You can find legacy/archived universal control downloads on a little link next to the regular download.
This is an irritating bug to be certain, and I have no idea if the tech support even realized that they should submit it to development, even after days of back and forth where he was certain somehow I was making a mistake in my setup. How could that be if a simple firmware rollback fixes it perfectly.