Auto attack is turned off by default in all forms of invis/windwalking.
It's actually one of the more annoying parts of playing SA actually, since he won't auto farm while you look for gank targets unless you use attack move.
Don't think it was like that before, must of been changed since I turn AA off.
Just had a nice comback game, me playing Omniknight. Enemy team trying to take down our barracks for a good 15 minuets, a number of times we had only 2 guys to defend against 4, but we defended and waited.
Near the end, they were trying to barrel down the middle and end it. Timed it just right, bought back, phase boot and ran into the fight, ult, healed up the damaged caster, put repel on the Beastmaster with a Heart, And we stunned the Antimage down long enough to finally kill him straight up (No Ageigs that time), still had a full team, barreled down the middle killing two other people trying to hold us off, destoried the T3 tower, knocked down the barracks, and just kept going to get the Ancient before AM could even revive.
The moral of the story is save for buy backs, or Omniknight will murder you, or something like that.
Was a lot of fun betting on a VS when I repeled my self. Had S&Y, Phase Boots, and and the Degen Aura made it so she could do anything. Sadly, I'm not really a carry, so while I beat on her for a while, when repel ran out she just stunned and ran away.