I have the same problem. Did you ever figure out a solution? I also have seven ND+2's and they all hang when I try to do a socket.connect to a device that isn't connected to the network. The only way I am able to get out of the hang is to power cycle the device. I also leave the ND's powered up over night and at least three of the seven will not be pingable in the morning.
- RichardVef likes this