Issue: alarm have gone off one hour earlier than expected

I’m in Brazil, São Paulo. and I’ve set the alarm for work days 8:30. Before going to bed, I’ve checked that the “time left” for the alarm was consistent: it was 0:30 and the notification bar was showing that the alarm would launch in 8:00 hours.

Well. The alarm have ringed 7:30… 1 hour earlier.

Do you have any clue why this is happening?

What app version do you use?

In latest 8.4 there were some fixes and improvements.

Ps. I had reports about delayed alarms (battery saving results :/) but never heard about alarm staring too soon :).