When I am in a private tab, I have noticed that Saved Site Permissions are logged, even when I did not proactively confirm to save site permissions. I have only encountered this issue with auto-play permission for video.
Ideally, I would not want Brave to save any site permissions set in a private tab, and especially if I did not actively confirm.
Update Channel dev
OS Platform Microsoft Windows
OS Release 10.0.15063
OS Architecture x64