Yesterday, I upgraded Brave on my desktop and noticed about 4 pending BAT was missing after the upgrade. To be able to document the issue I upgraded my laptop just now - making screenshots as I went along.
Before upgrading I was running this version: 1.23.64
On an empty tab:
And in the Reward Settings:
I then proceeded with the update (debian repo). After restart - Brave version: 1.24.60
Now on an empty tab (notice clock - 10 minutes after above):
And in Reward Settings:
I posted this on Reddit but the moderators decided to remove the post. I think this is seriously worrisome and not very confidence inspiring!