Billboard text artifacts in Brave browser

Brave browser shows show weird black dots artifacts when displaying text.
Tested with latest version of Brave, on 3 different computers. All show the same black dots artifacts.
Screenshots below are from Brave browser displaying two sandcastle examples:
https://sandcastle.cesium.com/?src=KML.html
https://sandcastle.cesium.com/?src=Export%20KML.html

Looks like if I turn off the Brave “Shields”, then rendering is correct. No more rendering errors.
Very strange.