It is the 7200-30 brazilian version (with wifi amplifiers)
I upgraded from version 10.0.5.33(C500) to 11.0.5.5(C500)
First of all, I tryed to reset ALL devices to factory setting after upgrading, but the bug is persistent. All SSID of sub-routers are systematicaly replaced by the hidden SSID/Password of the Link+ feature
