Xerath Point of View Bug
[Gameplay] Xerath Q gains global range
This is what the script looks like from Xerath's point of view hopefully you can use this to fix whatever is going on.
Side note I would highly recommend not going to their site at the bottom of the video unless you are a riot employee and are actually investigating them and I would be careful even then.
Can be seen from: ~17-24 ~35-43 ~53-1:00 ~1:14-1:22 ~1:31-1:39 ~1:51-1:59 ~2:08-2:17 ~2:45-2:52 ~3:07-3:18
Something weird happened ~2:18 with leavebuster probably for being in base all game
While Xerath stands in a certain spot in the base his q appears to hit every non-friendly unit. I would test this myself but I don't own Xerath. However since the people who are abusing it say it is an exploit (in the video title at least) I would say go and try it out in practice mode. Just look where he stands in the video and try firing in a bunch of directions to see if any work. Hope this helps.
Disclaimer: I'm just trying to help riot fix their spaghetti code.