[GAMEPLAY] Two Bugs on Amumu's Ult Relating (Separately) On Cooldown Timer and CC

Cooldown Timer On Amumu, ulting AT THE SAME TIME HE DIES will stun everyone around him. You can even hear Amumu's ult. However, the animation of the ult does not appear and the cooldown timer does not show. Even though his R doesn't show the cooldown timer, it is really there. If you want a more clarified explanation, it is listed below:

1. Amumu is about to die.
2. Amumu ults at his last moment
3. Enemies around him gets stunned, but the animation does not appear.
4. Amumu's ult cooldown timer does not show, but the ult cooldown is still there.

It is like not seeing Teemo in the river when he is really there because he is camouflaged just as not seeing the cooldown timer when it is really there because it is a bug.

Crowd Control On Amumu, his ult stun did not cancel Katrina's ult channel. After Amumu's ult, the animation appears and so does the sound. However, the stun affect does not appear because Katrina is still ulting. If you want a more clarified form of explanation, it is listed below:

1. Katrina ults around Amumu.
2. Amumu ults around Katrina.
3. Katrina not stunned and still ulting and doing damage.

I do not know what specific circumstance would make this happen. As Amumu, I have ulted Katrina and canceled her ults before.