[GAMEPLAY] Maokai, Nidalee, Elise & Katarina HUGE BUGS

Ok so, there are three BIG bugs that I want to talk about that affect gameplay a lot.

1. Recently when I tried the new Maokai, when I used his ultimate it went off fine and it was able to fully cast and snare champions. Immediately after I successfully casted the ultimate, I then died. After I respawned, the ultimate was on a cooldown of 0 and I could literally use it again. This happened when I was level 6 so I was only dead for 20 seconds or so but the cooldown is 120 seconds. So, I went to botlane and checked to see if the ultimate would still work or if it was just a display problem. Amazingly, the ultimate went off and it was totally fine. Please fix this! 2 & 3. This obviously has being happening a lot and it's hard to fix but anyways, when I play Nidalee or Elise, their spear & cocoon respectively will pass through units when the skillshots literally hit them. This has happened more often on Nidalee than Elise. I understand that the skillshot width is very skinny but the projectiles literally passed through (for example a krug) and no, I was not blind or joking. The skillshot, literally passed through the unit and didn't deal any damage to the unit.
2. So this has happened to me four times or so when I play Katarina. Basically, when I ult and a champion stuns me, my ult timer (the death lotus activation bar - the one that ticks down depending on how much death lotus you have used) still goes off. This wasn't the huge problem. The huge problem was that even though the stun had worn off (very few stuns in a game is more than 2 seconds), my Katarina model was standing there still as a stone and I couldn't move or do anything. I was not suppressed, stunned etc. because it had gone off. The problem was, like I said, my ult timer was still going on even though I had been stunned and even after the stun finished, the ult timer was going off but I couldn't activate anything at all, move, attack etc. I was just still as a stone. Also, even though the death lotus timer was going off, my Katarina was not spinning nor did she deal anything damage, she was just standing there and the channeling timer was going off even when I was stunned.

It's really hard to explain these bugs because they're so small / big that it's difficult to process and analyse. I know when I see a bug because I just know. For the Maokai game, I have footage, it is available on my most recent Maokai game somewhere between the first 20 mins or so. The Katarina one was also recent but I couldn't remember which game it was. Thanks and I hope you guys can look into it!