Hi,
The auto brightness is still broken on my venu 2. It started happening a long time ago after one of the updates and it never got fixed.
At some point during the day my watch will stuck on full brightness and will stay like this even in complete darkness. Restarting the watch fixes it temporarily until a short while later it will go full brightness again.
I have seen loads of posts regarding this issue from over a year ago and I really can't understand why this hasn't been fixed.
I'm on firmware 15.20