In events you should have something like this:
Lock command sent to Front Door (this is ST sending a command Source:Command)
Front Door is Locked (source: Device, with name lock and value locked)
With wireless connections it just sends the command and assumes the lock will respond. There is retry logic built into the protocol, but it doesn’t report if a device does not respond. This is not unique to ST.
How long did the lock work fine? How far is the lock from the hub? If its not a range/interference issue than it may be a faulty antenna in the lock. Schlage has a one year warranty.