Unintended Auto Attack While Stealth

If you watch closely, after GA triggers and jumping away with my Q, my cursor is well away from selecting Vayne, but I'm forced to auto attack her and break my stealth. There is a moment after casting Q before my click goes off to move. Does stealth enable auto attacking enemies if standing still? This might be so, in which case, not a bug, but a feature of gameplay I'd like to highlight.

Here is another bug I'm trying to get more attention: http://boards.na.leagueoflegends.com/en/c/bug-report/9JYQP2AJ-razor-raptor-buff-reveals-champions. It seems that the bug for that one is wards triggering Razor Raptor buff over walls without direct line of sight.

I'll try to get find more bugs I've experienced with Shaco. I have no life, so I'll be back.