[GAMEPLAY] Kalista E doing less damage than intended

Since patch 4.21, additional stacks on Kalista's E no longer scale with her AD. Instead of a base damage amount per stack plus 20-30% of her AD per stack, it is only the base damage per stack being applied. The 60% AD ratio for the first stack will apply correctly, but not the ratio for any additional stacks.

How to reproduce: Attack an enemy more than once and activate Rend.

Frequency: Always.

Actual damage values in game tested on Dragon (21 Armor) with standard offensive masteries: 103 AD: 92 per AA, 106 maxed 1 stack rend, 218 maxed 5 stack rend (should be around 328 if the tooltip were correct) 245 AD: 216 per AA, 180 maxed 1 stack rend, 292 maxed 5 stack rend (should be around 551 if the tooltip were correct) You can see a clear 112 damage gap between 1 stack and 5 stacks in both instances, which is roughly expected if only the base damage was being applied, 32*4 = 128 base damage verses the Dragon's Armor value.

This is a repost of this bug as I was afraid it got lost in the midst of all the double Rend glitch threads.