I tested it with this firmware and it seems to work as expected. However, the state should not be 'disconnected'; it's why your other router doesn't get an IP. If you change from Bridge mode to NAT you still get disconnected? Even after you reboot the router?
Can you provide the router's Troubleshoot file taken when it is Bridge mode? It can be downloaded from the router's WebUI, System → Administration → Troubleshoot page.