I do not mean to imply direct causation here, but last night we applied update 2.3.6.136 to our C-7 hub, and this morning one of our Schlage Connect Locks had factory reset itself. (not the same lock from my post here)
The hub shows the lock as not responding, and the 2 factory codes are now back as the only working ones. When nothing else worked and I resorted to trying one, the lock performed it's whole initiation / calibration motor sequence like it was brand new. Hence my conclusion.
Has such an event happened to others? It's a somewhat hard thing to search for. 
Thanks!
Al