For us, the screen size bug was able to be fixed by completely closing the game and reopening it. We came across this issue on an Xbox One when trying to play the new Season of Fortnite. If this is you, then you'll want to follow our guide which will show you how to fix the Fortnite screen size issues on PlayStation 4 and Xbox One.
With the launch of Fortnite Chapter 2 Season 1, lots of players are experiencing issues with their screen not fitting on their TV.