When suddenly migrating to a much newer version of the Brave browser, I saved my BAT wallet in the old version and recovered it in the new one. However, the around 81 BATs in the old wallet were converted to a negative number (-81 BATs) in the new wallet, following which I was warned that the funds were insufficient to pay the selected publishers. Soon thereafter, the negative BAT number was converted to 0, after which it has stayed at zero, since I do not trust that any deposit will not be converted to a negative amount.
Is this a known bug? Is the amount of BATs just displayed incorrectly or has it actually vanished?