I have two monitors (probably not uncommon), and I also use a lot of pinned tabs (gmail, calendar, trello etc).
When I want to drag one window to the other monitor to work on two things at once, it opens all the pin tabs as well. On Chrome, it only takes the new window and not the pinned tabs. I prefer the way chrome operates, as the brave method punishes my RAM even more than it should…
PS - love Brave - keep up the great work