Kalista and Guardian Angel

I know her passive says that her basic attacks cannot be cancelled... but she not only finished the autoattack she was in the process of doing after she died, but also fired another one (which went off instantly) while in stasis.

• Kalista is in the middle of autoattacking with lots of attack speed
• Kill Kalista (with Guardian Angel)
• Observe that the autoattack still completes
• Observe that a second autoattack is fired with next to no animation time.