I find this hard to believe but there is another report out there claiming an Air France crew that was waiting to takeoff with an Airbus 350 was cleared to position and then cleared for takeoff and added takeoff power only to realize that one of its engines was still shutdown... If true then this incredible even for Air France!
Unfortunately you must subscribe to read the article.
https://www.latribune.fr/entreprises...ls-928608.html