Xerath Ult Bug

Recently, as of the last few patches, I have been having terrible problems with Xerath's Ult glitching out.

The problem generally occurs when I trigger his Ult and then begin to fire off my blasts at the intended target(s). However on many occasions, the first shot will fire directly at my stationary form, leaving me only two more shots to work with. Most of the time I really need all three shots to chip down the enemy's health so this particular glitch is very detrimental to my play. Others that I have played with have witnessed this taking place and can attest to its frequency as of late.

I have tried many variations on using the ability, thinking that maybe it's based on my firing too fast after activating or something to that extent. However it appears to pop up randomly and usually at the most inopportune times. I am unsure of if this is something only I have witnessed (as I tend to play a LOT of Xerath), but I do hope that by shedding some light on this issue that there might be some way to fix it.

This is my first time posting a bug here, so I apologize if I haven't posted properly. If that is the case- please let me know! Thanks!