I am on the Dev, just downloaded it two days ago. I had a little over 1 BAT in my Rewards estimated Account and 30 BAT in my wallet.
It asked me to update today, I did.
-Brave is up to date-
Version 0.63.8 Chromium: 73.0.3683.75 (Official Build) dev (64-bit)
Now I have zero BAT rewards. My wallet is still good though.
It also says I have 0 Ad Notifications as well.