Drinking/Eating before dying and not keeping the original item

Hi. I was on a Minecraft server and I drank a potion in the nether just before I died. I didn't have enough time so I died. After that, the potion vanished, leaving the empty bottle in my hand. The server has keep inventory set to true, so I know that happened. After that, I was thinking if I saw the effect there while I was in the respawn screen, but no, it wasn't.