My Estimated Earnings for December was very different from what is actually being sent to my account

My Estimated Earnings for the month of December were closer to 2.5 BAT and I am only receiving 1.5 BAT according to my Brave Rewards profile. This was not the case with the previous month (November) when the estimated amount and the received amount were roughly the same (around 2.5 BAT). Has anyone else experienced this issue?

Screenshot are welcomed so we can understand your case better.