The latest patch fixed 3 bugs:
Fixed a bug where Yasuo could be locked out of his basic attack after casting Sweeping Blade or Last Breath
Fixed a bug where Steel Tempest wasn’t always critically striking when Yasuo had 100% crit chance
Wind Wall no longer fails to block projectiles in the instant it was cast, if cast at the same time Yasuo died
Fixed a bug where Sweeping Blade could be chain-cast on multiple targets without cooldown or cast time if cast while knocked up
Before I continue, thanks Riot for making a dent in the bugs list :)
Alrighty, here is the updated list of the current bugs for Yasuo:
Yasuo's Q can be cast during his ult's animation if it is off cooldown, and will not in the process display an animation of its own, simply doing damage upon completing it's normal cast time and otherwise functioning as normal. May be intended, but not represented in any tooltips nor precidented by other abilities. (Posted by Enigma Requiem)
If Yasuo cast his ult after Azir casts his, there is a high chance that Yasuo will stay on the opposite side of the wall and still complete the ult animation and damage. He is supposed to blink to the targeted enemy, and should not be "ricocheting" off the wall before the ult starts. (Posted by me)
E Bug: If you use sweeping blade directly as someone is dashing towards you, there is a chance you will dash in their same direction. (Basically you go 180 the opposite direction you intended) (Posted by me)
Ult/Azir Ult Bug: If Azir casts his ult and you proceed to ult afterwards, there is a 50% chance that the ult won't instant you to his position. Instead you will do the ult animation and damage at your current position. The other half you instant through his wall and continue as normal. (Posted by me)
Ult/Q Bug: When you have your Q fully stacked and ult off of someone else's knockup, the q resets but the animation doesn't. It makes it appear as though you can still cast Steel Tempest as the tornado. (Posted by me)