Kaliata bugs more than Mordekaiser
I just played a game with her, and holyshit.
Midgame I bought a new spear to make another ally my Oatsworth. When I tries to bind with that champ, the item just went on a 10 s cooldown, so I could not pick a new oatsworth that game.
When I respawned once, Kalista had her legs inside the ground until I died.
Sometimes when I jumped, she just stood there for a while, and I could not attack the enemy (which actually made me lose the fight)
No wonder nobody plays her. Buggy and bad.