 He was subsequently banned from refereeing for 6 months, a suspension that was kept secret for several years until the German newspaper Die Zeit published a secret file from the German FA.On 21 February 2016, Bayer Leverkusen manager Roger Schmidt was sent off by Zwayer in a match against Borussia Dortmund after disputing a free kick that led to a goal for Dortmund, the only goal of the game.Schmidt initially refused to leave, causing the referee to suspend the game and lead the players off the field, causing an eight-minute delay, before the game resumed without Schmidt on the field.