Same behavior from both of my Zen15's.
I have them set for auto-on after two minutes of being turned off.
There is no report of "On" after the two minutes are up, even though the Zen15's are back on line.
The Zen04's I have do not behave this way, and report "On" after an auto-on.
Would this be a driver thing or a Zooz thing? @agnes.zooz ?
Never mind. I answered my own question, again.
Somehow parameter 24, related to reporting, got changed to 2. I'm pretty sure I didn't do it.
The default is 1. I changed it to 1 and it seems to work okay now.