League of legends practice tool tower attack range display glitch

In practice tool, I was practicing Quinn, I approached the enemy turret until it shows its attack range. I disabled Tower Fire and enabled Tower invincibility. Its attack range eventually increased and accelerate its increasing speed and later, it reaches ally base and get back in a reverse way in a weird form... It becomes normal if u leave the place where it will show tower attack range, but it happens again as soon as I approach and then covers summoner's rift I have no idea and it just happened all of a sudden.