Question / Help Display capture problem

[Tqoh]

I stream fortnite, and I have been trying to start streaming with display capture so when I am eating or something I can just pull up a video real fast and start watching videos with my stream. But I every time I start playing than alt+tab from the game I get a black screen in obs for a couple seconds then it shows my desktop. When I re-open fortnite it opens back up smoothly with no black screen. Please help :(