I am not a MacOS person, but Brave released a new feature to customize keybaord shortcuts inside Brave which is obviously causing some small issues to MacOS people.
So, you can go to brave://settings/system/shortcuts see if removing the settings shortcut fixes it, if not, you have to disable the feature with brave://flags/#brave-commands, especially if you are not the type of person that will customize keyboard shortcuts.
That’s basically the information I wrote to someone else in a post yesterday.