Kayn malfunctions

So I play Kayn quite often and am wondering if anyone else has noticed these things.

When you ult someone, there is a chance that you will die while you are inside their body even though you are supposed to be untargetable. Sometime I die because someone has put something on me before I ult, but most of the time its because the game wont let me exit their body when I want to or something just happens to kill me.

1. I have been killed by a Lucian while inside a zed, and I have no idea how that happened. This is one example of many times that I have died from uknown causes. One time I think it was a static shyv that still connected to me though it was inside someone.

2. I have been killed by a Morgana because she ulted, then I ulted her, and her ult killed me because it wouldn't let me leave her body.

3. I have been killed by Tristanas bomb while I ulted her, same situation as morgana, I couldnt leave.

4. I've died from Zeds ult after ulting said Zed, same as before, I couldnt leave.

I kinda understand still dying while you ult someone becasue maybe they put something on you, though I think thats dumb and Kayn should be invulnerable while he has ulted someone. Please riot fix the bug with not letting Kayn leave the body when the player chooses to. I am tired of being stuck inside body when I try to leave early.