My Iro watered on Sunday morning, but I didn't see any notifications on my Android phone, nor my iPad. However, this morning at 1:38am it informed me that watering started and then 1 minute later completed with a duration of 190 minutes. After some brief confusion, I looked at my phone and history to make sure there wasn't a time hole opening up.
Indeed, all seemed fine, so something odd is (was?) going on with notifications.