I would give it a few days to see if it sorts itself out (leaving it in standby at night of course). I have a HB-1000S and a HDR-1000S. The HB-1000S is in the bedroom and wakes up every few days to do something. I only know it has woken due to the refection of the network activity LED off the wall.
The network activity could originate elsewhere on my LAN or it might be just checking for new firmware, What I do know is that it does not do this every day.