Jinx's Ult is teleporting and doesn't have an accurate position

Hello,

I have the problem (or the bug) that the ultimate from Jinx teleports ahead of her. The visible rocket, which is flying, is not the actual position of the rocket: it's literally flying ahead. If the visible rocket hits a target, well then nothing happens, only the invisible actual hitbox of the rocket is hitting the enemy. The rocket also doesn't start from Jinx (like it should), but it starts ahead of her. I'm not 100% sure why it's happening and even the full repair won't help, but it seems like the bug appears if the rocket is a) spammed or b) kills an enemy. Strangely enough the bug doesn't occur when I first leveled it in the practice tool, it started to appear when I killed the bot, towers etc. I hope the video helps visualize the problem better, since I don't have the best English. I get the bug always when I play Jinx, it happens in every mode I play, even in practice tool.