PSA: 6.1 bugfix to Yasuo's windwall vs TF gold card did not stick
http://na.leagueoflegends.com/en/news/game-updates/patch/patch-61-notes
"W - Wind Wall WIN WALL Fixed a bug where certain targeted abilities (such as Twisted Fate's Pick-A-Card) would pass through Wind Wall as it spawned"
I can't remember if the fix even worked originally in 6.1 but I can confirm this bug does exist in 6.5.
Also found a recent gif of this bug being affected by Brand's R as well: http://i.imgur.com/REFSdA6.gifv
I will spam your forums until you acknowledge this bug still exists and confirm that the team responsible for these bugs is at least looking into a legitimate fix.
NOTE: This thread is to raise awareness to Riot about a bug that severely affects the game play of a champion. Please keep all opinions out of this thread. Thank you.