@DaReaLDeviL Brave GitHub issue report open and linked below. You may want to track the issue report to see if any progress is made.
Linked workarounds that have been posted that worked for some users below. If you haven’t already, you should test and see if they work for you.
Problem, Brave shields they are disabled by default - #21 by JhonBlank
post #21 above
Brave Beta Shield down by default - #5 by 289wk
Brave Shield not on by default - #3 by lastgasp