kalista unable to be stunned by annie

Did the skill go off successfully? (meaning you were not cc'd) Was she smacked with a Q, E,R? The Kalista was in the center of the AoE (if E/R), or was it at the edge? I've noticed that Annie's E range is a bit inconsistent around the edges.

Just had the same problem playing as Tahm was unable to stun or swallow lux it was fine on all the other players but i tryed stunning lux 4 times was spamming w. Then zed ulti her and while spamming w I swallowed him up and he didn't get his combo off after his ulti. All I can think of is that Blazer0234 was using 3rd party program to cheat.