Ending Brave Bug

Hey i am Arman and i switch Opera gx to brave But there its a bug form windows 10 when i log in to Roblox or Gmail or something like else and i leave the browser and i go to it and i log out of All what i log in befor it Please tell me why its it Happending and the website roblox.com accept Cookies and Youtube and other medias please tell me <3