Saw this today as well. I have this exact issue for the last 6-9mo on my 2016 Touring. Dealership blames in on the battery, which for a stock 2016 might be reasonable, but have not yet replaced it. Odd to me that it can start from cold, but often (not always) fails to auto start/stop after idling during operation. Maybe I'll file a NHTSA report to add evidence.