I launched Brave on my spare machine for the first time in a while. I had set it up previously to “restore” my wallet from another machine, but then the spare machine went in the cupboard to be forgotten about for a few weeks.
When I launched Brave, the browser seemed to “re-restore” the wallet from the other machine. This has worked fine (don’t know if that’s supposed to happen or not, but hey ho!), except for the fact that the Rewards panel now shows I have 1.2 billion BAT designated for creators… which is simply impossible - I haven’t had that many ads
See the bottom right of this image: