Jolla was booted after dismissed alarm
Having dismissed the alarm today, I actually managed to turn on Jolla from turned-off status. I do not really know how, but I first tried to dismiss and failed. Second attempt succeeded and Jolla was unexpectedly booted.
I will try to reproduce this behaviour.
Since it regrettably is not a feature I call it a bug.
I would rather it was a feature, as requested here: https://together.jolla.com/question/28517/turn-on-jolla-from-the-alarm/