Zyra model size kept changing

I was playing a game of aram as leona, and the model size of the enemy zyra kept fluctuating. She had dark harvest as primary and sorcery as secondary. One specific instance i q'ed her and she instantly got bigger. GP on my team also thought he saw her size change, and when i asked zyra why her size was changing, she didnt know and said she just realized it and asked why she was so tall. She didnt have any elixirs either