Ad notifications received issue on Mac

Been using brave for a few days. Have ads per day set to 5 and finally got “Ad notifications received - 1” and 0.05 BAT for it but I never actually saw the ad or got a notification. Using macOS Sierra v 10.12.6 and in my notifications I have Brave Browser alert style : set to Alerts.
Version of Brave is :
Brave is up to date
Version 0.64.76 Chromium: 74.0.3729.157 (Official Build) (64-bit)

Any help suggestions?

Potentially you might have just missed it? sometimes I find I don’t even notice them now.