Skarner E Bug + Battlecast Skarner animation bug

This bug has been around for a while, but i haven't seen any videos on it so i made this. The first bug is when skarner attacks a marked enemy quickly after casting E, Skarner does a basic auto attack and does not proc the stun nor consume the mark. This happens when he crits, and with Battlecast Skarner. The second bug on Battlecast Skarner is when you cast E during your auto attack, you will cancel your auto attack as usual and fire the projectile, but will not cancel the auto attack animation, nor show the E cast animation either.

Replication: 4/10 Gamebreaking: No Impact on Skarner: medium-high depending on scenario