I was playing Amumu in an ARAM; a friend of mine was playing Kalista and another friend was playing Sivir. Early in the game, roughly when the first minion waves met, Kalista attempted to bind me while the two teams were fighting. I became untargetable as usual while Kalista did this, then died to the enemy team almost immediately afterward, but Kalista's spear still correctly appeared with my persistent effects. Upon respawning, I noticed that the animated link between Kalista and myself was not visible. Kalista bought another spear when she died, tried to rebind me, but was unable to click on me. Instead, she attempted to and successful bound herself to Sivir. The animation that shows champions bound to Kalista then appeared for both me and Sivir, and the spear icon still appeared in my persistent effects; I do not believe it appeared in Sivir's persistent effects. When Kalista ulted, Sivir was the one who was affected; I was unaffected. Kalista tried buying another spear, but was still not able to click on me to bind herself to me. Here is the match history (not much information there, but it's the most that I have): http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1963214714/31657010?tab=overview