Cho'gath has (at least) two bugs (Q/R) and a possible third bug? (Rift Herald Bug)

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Cho'gath's Q animation appears twice, after the initial Q animation and knockup is complete, the Q animation happens again (without knocking up anyone within the animation). This happens EVERY TIME Cho'gath uses Q and I haven't seen a time when the bug hasn't happened since the release of path 9.6.
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The second bug is when Cho'gath presses R on a minion on low HP but another player takes the minion and gets the experience and gold from it, Cho'gath's ult still goes on cooldown and doesn't gain the stack. Unlike the Q bug, this one isn't purely visual and is more serious, even if it doesn't happen as easily or often. Video: https://vimeo.com/326025755 - If you watch in the bottom left corner, the ult goes on cooldown but Cho'gath's number of stacks stays the same (at this point I had 5 minion stacks so should have been able to stack once more off minions, plus I didn't get the gold or full experience).
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When Rift Herald tried to get past, it teleported itself to the other side and charged at the tower. Note that in the replay, it shows as visible but in the game it went invisible and from our perspective, teleported from in front of Cho'gath to behind. Again, another frustrating bug that has more serious consequences.
Video: https://vimeo.com/326025919