Kalista has multiple bugs?

When I use the attack move on Kalista, my attack speed is noticeably slower than when I'm standing still. I don't notice this at the beginning of the game, but after getting BOTRK and Hurricane I notice it big-time. (and yes, my boots are fully upgraded) I saw a post on Reddit saying that if you use only right clicks, she attacks normally. However, to my dismay, that post was over 300 days ago and I haven't had time to experiment since then.

I understand how Kalista's attacks speed goes down when she is slowed. Her hops have to take longer, thus affecting her attack speed. I think this should be addressed or at least listed as a disadvantage in her passive. But I see no reason for her to have a slower attack speed when she is NOT slowed.

Her E (Rend) doesn't always reset her cooldown and/or mana. I notice this when I have an auto attack mid-air. I noticed that if you have an auto attack in mid-air when you use Rend, it Rends the initial stacks on the target, THEN the other attack separately once it reaches them. I speculate that it might be due to the fact the my initial Rend doesn't quite get the farm, then my extra auto attack hits the minion and kills it, THEN the Rend for that single one goes off (even though that minion is dead, resulting in no cooldown refunded and no mana refund even if I killed another minion in addition to that one). And yes, my gold count is on so I can see that I am getting the last hit.

She also has a bug where she can ult Kog'maw's dead body. Her W gets stuck in a wall if you sent it out from base on Ascension, thus remaining there the whole game.

Please let me know if you experience any of these bugs, have an explanation, etc.

I want my Kalista to be viable again. Please?