RENEKTON BUG WITH E 2ND CAST (cursor becomes a blue target)

While playing renekton I've encountered a problem several times : during the 2nd cast of Renekton's E (dash), most of the time your cursor will stay as a blue target. This means you cant ping, click your minimap, pretty much lose all of your left click actions. The only way I found to remove the target is by recasting E and making sure I would get the second cast through an enemy. This would successfully remove the blue target on my mouse until I would cast it again. Does not affect E first cast, it is on the 2nd cast only.

I was playing with my skills set on smartcast.