https://www.pcgamer.com/epic-says-it-will-remove-an-unintended-swastika-in-fortnite/

A group of Fortnite players noticed something odd and unpleasantly surprising in the way four metal floor tiles came together as part of an in-game dance floor they were constructing: Where the four corners joined, a very distinct swastika had formed. 

The symbol is generated when the tiles are placed together and then edited into a circle, redditor EuBestCityEu explained. "We were making a dance floor in tilted when one of my teammates noticed this," they wrote.