Kalista Attacking while reviving (GA)

I don't have a video of it but everyone in my game saw it. We caught out their Kalista and blew her up. While she was reviving with her GA she was still attacking and life stealing. She killed two of my teammates while untargetable and killed the rest (with her spear stacks that she was able to put on us) after being revived with full health due to life steal. This bug lost us a game after we made a great move. Please look into this.