LOL ctrl + click mouse pings fly off the screen?

I play with 4k dpi right, and for me that's perfectly fine and easy to control. Anyway, the thing I notice in league is whenever I do a ctrl + mouse drag/click ping so for example I drag the mouse to the left to ping careful or whatever, the mouse will suddenly accelerate 500000000000mph to the side of the screen to the pt where I can't even control it anymore. I have no idea what the problem is, anybody else have this issue? Using a g502 btw.