Same issue for me. Honestly it’s hard to understand what is happening with brave. It seems there is some random and support is ok to fix problems but it lacks explanations.
From my side I got more than 12 BATs in estimated earning and after update I have +4.55 arriving and 0.8 in estimated earning. So what about lost BATs ? There is a problem with 7 BATs. I guess it provides from this Update: New and improved “Estimated pending rewards” (Brave Ads earnings) counter coming in v1.27
I hope communication will be better in the future …