Spiking minion during last gasp affect kills the offering early

I dont know if this is intended or not, but if you spike a minion during last gasp, at the end of the last gasp affect it kills your offering. Seems like a bug since the duration of the buff Soul Offering saying 8 or 9 seconds, and it ends early due to last gasp, seemed like the interaction wasnt intended.

Video: https://youtu.be/f91iFO0XMgE