Mediv cast spells while in raven form

Bug Report
1

I was played at mediv on ARAM match, and on 14-42 time match i notice that i can cast spells freely.After match dude with nick- GetAvayBlizz start call me cheater at direact and type bad words about me,my low rank and etc. and it deeply upsets me(. and no i have no clue what lead to all of this(free spells and badmoth at me)
https://drive.google.com/file/d/1q0VgkOdOntcyAFUcZUOr10bDgYOq6Mq_/view?usp=sharing

2

Steps to reproduce:

  1. Pick Poly Bomb as ultimate
  2. On talent 20 pick Glyph of Poly Bomb
  3. While transforming into raven form, constantly try to cast ultimate ability near you
  4. Now you’re an invincible Medivh that can cast abilities and contest camps without getting any damage.