Kalista Soul Bond Bug
Pretty game wrecking bug. Basically cancels out half of Kalista's kit, and can screw with your soul bonded ally.
Basically, if Kalista is in the middle of her animation of bonding with an ally by ripping out a spear from her chest and she's killed, the effect will go onto her Ally, of course Kalista dies, but then she keeps the item in her inventory and can keep trying to use it on her ally to no avail.
When she ults, her ally cannot dash in any direction to initiate a knockup, and in fact after timing out will not be automatically knocked in the direction Kalista is facing. Essentially, Kalista can only use her ult to save her ally.
Additionally, sometimes when the ult animation ends and the ally is returned to his corporal form, he will be unable to do anything for a good 5-7 seconds.