Ekko q and r bugs

So i recently played an ekko game on crystal shard (ascension) and i had this bug that if u throw ur q, it will fly with high speed to max distance (not slowing down) and then disappear. It will do damage on the return but it was invisible (for me). At the same time, the "shadow" of the ult was bugging around, sometimes going all over the screen and disappear again or just disappear by not seeing it (vision and stuff). This was the first time this bug happened to me and yea just wanted to say it, because it was very irritating for me to play with this. Thanks