Though a different issue / topic . . . see the tips, re Brave Ad Blocker Updater and installing (and testing) Brave Beta in order to see if you get the same results, at:
New March 2025 Youtube Blocking Logging in Under Brave - #2 by Mattches
New March 2025 Youtube Blocking Logging in Under Brave - #4 by Saoiray
Perhaps @fanboynz (Brave team member, specializes in Web Compatibility) will also be interested. (You do not have to PING him.)