[GAMEPLAY] Maokai Sapling Range Bug/Exploit

I was playing around in a CO-OP game and accidentally encountered this bug.

Basically, if cast my E on Maokai (sapling) once out of range, and wait for Maokai to walk a little bit, then proceed to cast it a second time right before the champion reaches the original cast spot and starts its cast time, the cast location gets replaced.

This sounds kind of confusing but I have provided a link of my gameplay.

It is kind of hard to replicate, but I believe the timing has to be right before the original cast time starts. The resulting range is pretty much global and can be cast from base to enemy nexus.

Kind of new to League of legends forums but still thought I should attempt to report this bug. Sorry if i have violated any rules for this posting.