Kalista Soulbind Ritual bug

Clicking on the black spear which appears on the ground while kalista performs her soulbinding ritual causes a bar to appear which says drain. If the champion you are currently using has a channeled ability, they will start performing their channeled ability animation. I was using katarina at the time when kalista was performing her soulbinding ritual at the fountain. Clicking the spear on the ground caused me to perform my death lotus animation.

Edit: Kalista must be using her soulbind on someone other you.