Zonk, I'm using an S9. Love that little machine.
Spouse, I've noticed that when I do have events they seem to happen about a half hour into sleeping, last about half an hour. Then I'll sleep largely uninterrupted during the night and have a cluster of events again in the morning, shortly before I wake up.
All I can say is that I'm sleeping better than ever now and feel more alert during the day. Can't wait until the sleep debt is paid off.