Game breaking bug in aram. THIS NEEDS TO BE FIXED!

Aram game is working normally, then near the end as my team is attacking the enemy nexus and the inhib comes up, my team is able to keep attacking the nexus and win the game even though the enemy inhib is up. Im not sure what caused this bug, but its most certainly game breaking. Being able to attack the nexus while the inhib is up is never supposed to happen.

I have attached a video recorded in the replay to show this bug happening.