Same issue here but what happened to me is that I actually had that “you will get x bat in 7 days” message so there was no problem at first. But that message disappeared in such a short time and now i lost all the bats. Really weird.
Edit: I just noticed that it is also rolled over next month. Idk why this happens.
The amount of reward i got in this month is quite higher compared when i started back february. Its around 10.5 BAT and like you it also disappeared suddenly and i didnt really notice right now. I hop they could fix it up soon. I’m just worried since i forgot to manually list down what i got in the notepad which i always do whenever the end of the month comes.
I would suggest restarting Brave, for me, last night it wasn’t showing the amount you’ll receive. I checked this morning and it does show me that 'your x BAT will arrive in 7 days.
Check if it does for you as well. Do revert back.
I had 1 day left remaining last night and today text is gone and so is all the BAT. Checked the other computers and they are all the same too, any BAT that was ready to claim as gone. I’m in the UK, so I’m in a supported region it’s not just a single browser, this is 4 browsers on separate machines and none are connected to a external wallet.
I’ll take that the BAT is gone and me posting in here will be like shouting into the wind.
Update Guess I was wrong, seems to corrected its self and was able to claim rewardss.