I have a wireless charger that I have been using over night so don't know about phone night time battery drain on that but there are numerous mentions of this on this thread too.
Let's hope Samsung take notice.
I have tweeted Samsung help UK. Not holding my breath. Informed them of this thread.
Have also backed up and rebooted but not restored.
See where we are again tomorrow
They've totally ignored mine from yesterday so far
Right going to try a reset again, this time, I am not going to do any updates that it asks me to do, I will then check it again tonight and feed back, trying to determine if it is an app update recently done.
Will let you know tomorrow morning!
EDIT: The apps it is asking me to update are: News Briefing, Alti-Barometer, Reminder, Calendar, S Voice and Weather. On my previous reset, I updated all except News Briefing and Alti-Barometer - as I don't use these, this time I'm updating none of them.