Sorry, @SBrown, I did not answer your questions. I am unable to access the dashboard (Connection refused), so i cannot restart the NAS that way. WD Access has a Shutdown command, but it does nothing when the problem occurs. So the only thing I can do is power-cycle (pull the power plug, wait 10 seconds, and reconnect).
I can also not ssh into the unit. Putty just hangs there, no error, no timeout.
There are plenty of others experiencing this issue:
