EA has had a lawsuit filed against them in the US over its Ultimate Team loot boxes.A Gamesindustry.biz report states that the class-action lawsuit has been filed in the US District Court of Northern California that focuses on the alleged use of Dynamic Difficulty Adjustment, a feature which artificially adjusts the difficulty to encourage players to purchase loot boxes to advance.Ultimate Team is currently available in the company’s Madden NFL, FIFA, and NHL sports franchises.