I’ve looked over the help sections and I didn’t see a similar issue. The problem I’ve noticed a few times is that Brave will not let me :
1)Resize its window (I can still drag it around)
2) Let me switch tabs (I cant create new tabs or move current tabs to a new window)
3) Refresh any current page (I can still use the currently open page and pause videos etc.)
The only way I’ve been able “fix” the issue is to terminate the process from my task manager.
Thanks for your time!