Balance 380 LAN Port settings

I am using Balance 380 in my small office, until firmware Ver. 8.0 it was working very fine, after update to FW ver. 8.0.1 or 8.0.2 whenever I want to change the LAN port settings, ie: from port speed “Auto” to “1Gbps” or from “trunk” mode to “access” mode, after “Apply Changes” I disconnected immediately then I must restart B380 Router, then I could have connectivity.
before the update, it was not like that whenever I made changes it was applying immediately.

Please Help: