Galio Ultimate
Hello
I've recently started to play Galio in ranked where people usually try harder than in normals and I've noticed a very weird thing. I used R on a Lulu and Katarina that had about 30% hp left each (perhaps Lulu was at 40%), and my ult would have 100% killed them both, but what happened was that as my ult ended, Lulu managed to ult Kata and shield herself before my damage was applied, making both of them survive (and me die but that's another story). I noticed the same thing happening when in another match a Diana used Zhonya after being taunted for 2 seconds.
Is this a bug or is Galio's ult meant to work like this? Either way I don't think it's ok though, it's already hard to use it properly unless you flash but then if you do it and people can still escape it, what's the point?