https://www.gamespot.com/articles/madden-18-update-out-now-heres-what-it-does/1100-6455997/

A new update is out now for Madden NFL 18 and while it is not a particularly big one, it does include some notable changes for EA's professional football game. Starting off, it fixes an issue where some AI-controlled running backs would move too slowly or fail to perform special moves. This patch also fixes an exploit where you could force kick-returners to run out of bounds inside their own five-yard line in some situations.

Additionally, this new Madden 18 update substantially reduces how often you'll get faked out on defense with a player-controller defender when trying to defend a ball carrier who is performing a special move. With an AI-controlled defender, the number of fake-outs in the same scenario sees a "slight" reduction.