https://www.gamespot.com/articles/xbox-boss-responds-to-the-xbox-one-and-ps4-cross-p/1100-6453422/

Recently, it was discovered that Epic's sandbox action game Fortnite allowed cross-play between Xbox One and PlayStation 4. The feature was swiftly disabled, with Epic saying it was a "configuration issue" that led to cross-play being available in the first place.

Naturally, someone asked Xbox boss Phil Spencer for a reaction to this situation. Spencer, who has openly called for Sony to allow cross-play with Xbox One, told a fan on Twitter, "I would have liked to see them leave it on."