I'm curious about the correct amount of BAT I have

Briefly describe your issue:
Curious about rewards discrepancy and why. When I go to brave://rewards/ I see 3.751 BAT but if I open confirmations.json → ads_rewards → payments → balance it’s shown 2.997 BAT (month 2021-05). What’s the correct amount then?
What Operating System and Brave version are you using (Menu --> About Brave)?
Desktop Windows 10
Brave 1.25.68
Is your browser wallet currently verified? (yes/no)
Yes
What date did you verify your wallet?
Someday in April
Have you been able to successfully receive payments in the past?
Yes
Are you using a VPN? (yes/no)
No
Are you in a supported region (see here for list of supported regions)?
Yes
Does your device pass the SafteyNet check (Android only)?
N.A.
Have you manually turned off Auto-contribute on all of your devices linked to Uphold??
Yes

It’s a screenshot from Android. But should be similar with desktop.

The one shown on brave:rewards and Rewards panel (BAT icon in URL bar) is the total BAT you’ve.

And I believe this one is for BAT claimed/paid in May. cc @Mattches

Perhaps the post at this link explains it?