[GAMEPLAY] LEE SIN BUG - Safeguard doesn't give shield

There is a Lee Sin Bug that I have found. This was on my friend's account in a normal game when I was at his house :). OK so the bug is. When Lee Sin uses resonating strike (2nd Q) he flies in towards his target. But when you safeguard(W) to an ally mid-flight, the shield isn't created(deployed?). I have an example in the attached video. It occurs at around the 13 second mark.

To replicate, you just mark an enemy with sonic wave (1st Q) and use resonating strike (2nd Q), and while flying, you safeguard to an ally champion. Usually the safeguarding to an ally champion should create a shield on both Lee Sin and said Ally, but it doesn't here. There you go!

This happens more frequently than it should. So i don't know if it was intentional, but yea!