Vision Bugs

Hello,

Today I played ranked and this bug occurred twice in the same game, and so I checked my replay to make sure there wasn't anything weird going on like a ward my opponent had placed earlier. The replay turned out to prove me correct unless there is something I don't know about. Before diving into the video it's important to note that I'm convinced that if i auto attack someone, the moment they have been hit by it i can walk into a bush and disappear from vision. I do not mean auto attacking and then walking into a bush before the auto attack reaches the target.

In the 1st of the 2 clips, I flash out of the bush, and then run into the 2nd bush before he begins the final auto attack. Using replay, I set it to show his vision, and I see how he retains vision of me after I walk into the second bush without any delay or trigger. In the second clip, I am flung over his shoulder by his E (NOT into the bush), and then I walk into the bush while his W causes him to shoot me, and once again he doesn't lose vision while standing outside the bush himself. I looked up his W to see if it gives him vision of the "locked" target but there is nothing to prove he does, therefore I'm convinced he doesn't.

Bug or no Bug?