I looked at your log and you dont reproduce the issue in them, at least I can't see any evidence in there that points to you entering standby and resuming.
Perhaps this is a different issue then and I'm not really entering standby, I'm turning switching my AV-receiver to TV and back the the HTPC.
It does appear that this is causing the timer to stop as new files aren't recognised and manual import doesn't work.
I know Scythe42 has changed a lot of stuff around restarting DirectX, resizing windows and things when these HDMI devices disconnect and reconnect perhaps a suspend/resume or similar event needs to be raised in these cases so timers can be re-initialised.
This happens every time so I shouldn't have too much trouble getting any debug info you need. In the logs you looked at, I had just started up waited for the background task flower at the top to finish and then powered down and up the AV-receiver then attempted to do a manual import.