Kalista can ult an unbound ally

Perhaps it would be more accurate to say she can ult an ally who hasn't finished being bound.

Had an ARAM just now where our Kalista didn't choose her partner until after she was level 6. She threw the spear at them, they started to accept, and immediately she ulted. The problem was, because of the prolonged "you have to die before accepting the binding!" ritual, her bound ally couldn't utilize the ultimate, and ended up dropping back at Kalista's feet in a half dead manner.

I realize this is an edge case, but please fix it.