[Gameplay] Demolish goes through Tower Invincibility on Practice Tool

This may be a small bug and shouldn't be a big issue to most, but I noticed while playing Camille in practice tool, the enemy Amumu was able to kill turrets through turret invincibility. After speeding the game up, I found out that the Amumu was able to deal chunks of damage to the turrets by using the rune Demolish. It was a little annoying when I was practicing my Camille combos so I had to wrap up that game fast. I don't really know if this is important or if this is a trigger for the bug, but I was Camille with flash/ignite, electrocute, and I was against a Amumu. Started game and first leveled up to 18 and got 30000 gold. Then bought a full build and started practicing combos. Don't know if that is what triggered the bug, but if this could get fix, its would be a nice quality of life improvement. Thank you for reading this!