On the R-200 routers with 4.2.3-R4(201606031245) firmware, there is evidently a problem with the Port Forwarding & Virtual Server.
When you enter pertinent data on either the Port Forwarding or Virtual Server section, apply the settings, then reboot - there is no data stored on either section after rebooting.
The attached picture is what you see after rebooting.
What gives?