Readynas 2120 v2 Power Timer

I am presently using a Readynas model 2120 v2 running firmware/OS 6.4.0 and have found the Power Timer is not working as expected. With Power Time enabled and correctly configured, my system fails to shut down and instead hangs during the process rending the power button useless and requiring a hard power down using the power switch on the rear of the device before elegantly powering up using the button on the front. I'm fairly certain this isn't healthy for the device given the manuals continual reference to "elegantly powering down". The logs page has not illuminated the problem for me at this point either and details.

The powering down should have occured at 23:00 and the powering up at 07:00. The logs show me manually powering up again at 19:48. Any information / advice at this point would be greatfully recieved. This is the second NAS I've purchase (with the DUOv2 being the first) they are great pieces of kit and this is just a minor niggle.