Rewards are removed

First I accumulated around few bat token .,after few minutes it came back to zero . Whts goin on with bat ,brave

happens in my pending rewards also

Dont know again the same issue , accumulated few again it came back to 0.1,whts going on brave. This is literally not expected. Kindly please rectify it

Happens every other day to me . Notifications are coming… Get some BAT only to restart the browser to see them gone.