https://www.pcgamer.com/optic-gaming-loses-dollar12000-pubg-prize-after-being-disqualified-for-cheating/

OpTic Gaming finished in second place at the recent PUBG Invitational tournament at IEM Katowice, earning it a tidy $12,000 in prize money. But that position and the prize have been stripped, as ESL has ruled that team member Ian "Bahawaka" Crowe took advantage of a bug that enables players to see through walls. 

Bahawaka's use of the glitch can be seen in the video below: