[Gameplay] Leona Zenith Blade while silenced

While I played a game as Soraka the enemy Leona was able to zenith blade out of the Soraka silence. I know for certain she was in the silence area because I place the silence around a ward Leona was teleporting ( yes it was a support with tp) to before her channel finished. Other people have experienced the same issue with Soraka vs. Leona.