[GAMEPLAY] Kalista Rend Double Cast

Happens in laning phase where you 1st skill/Q trade and last hit with 3rd skill/E, when you spam E it suddenly re cast's the skill which spends extra mana.

1. 3rd skill/E on a creep
2. 1st skill/Q anywhere then spam 3rd skill/E before the minion/champion dies.

I've tried it with no skin and Blood moon Kalista and happened each time, Items do not affect this bug.