Brave rewards reseting to 0.00 on startup

Every time I restart the browser my “Estimated earnings so far this month” counter resets to 0. I’ll earn the .025 BAT for viewing an ad but when I close and reopen Brave they’re gone. This doesn’t happen on my Macbook just my windows PC. dunno what the deal is

Just as a quick follow up/bump, I use a VPN most of the time, perhaps this is what’s causing this? Can anybody else corroborate? Just trying to find some kind of correlation. Cheers