With a 1756-L83E/B processor at 28.012 firmware (connected via an in-chassis 1756-EN2T/D at 10.010) Ignition OPC-UA Server would not show tags which were added under an existing UDT array. Tags would also be faulted if the tag name was manually typed into the tag editor. Refreshing the tag provider from the designer did not fix the issue. When the device properties was opened from the Configure section of the gateway and “Save Changes” selected without making any changes the issue was resolved.
Logix Driver 3.9.9