I have a Essence mk2 in my bedroom that I recently noticed is resetting every morning.  The "plop" from the speakers has been waking me up (usually, I wake up not really knowing why or with a vague recollection of some beeping - maybe someone's cell phone notification - but this morning, I was already awake and caught it). 

Looking at the log, the last few nights, it has reset as 5:11:18 (exactly the same time).  I see a log message for "Network state: down" (and I assume it resets which causes the "plop").  It occurs slightly earlier every few days looking at the history.  This goes back to at least late July (where I it was happening more around 4:30).  No more log entries before this.

During the summer, I use the Essence to drive outside speakers so this is probably why I am only noticing this now (only driving my bedroom speakers for the last month or two).

I've checked the logs of my access point and router, and see nothing unusual.  The essence is hardwired to an airport express as I found this more reliable than using the essence's in-built wireless.  

I'm upgrading from an Apple wireless environment (airport extreme, airport expresses) to a mesh in a few days and am hoping this fixes it.  In the meantime, I guess I turn off the "audible notifications" and see if this helps.

Any other ideas?