isAlive not always working

Research

[x] I searched but did not find an existing issue or discussion about this bug.

Description

I'm saving player positions to an array each tick, and using .isAlive to avoid some random position "teleports" that occured on death previously. However, on the last round of my demo, once the first player dies, the player's position is still tracked, and is set to a location far from the player's body. Everything looks fine in the demo, and doing getPos shows the correct player position on death.

Note the diagonal line from second mid to A site default:

Code to reproduce

if (demoFile.players[i] && !demoFile.players[i].isFakePlayer && demoFile.players[i].isAlive) {
                            tickPlayersInfo[i].position.push({
                                position: demoFile.players[i].position
                            });

Affected demos

steam://rungame/730/76561202255233023/+csgo_download_match%20CSGO-vEaAs-ofzax-iWYZm-hfYb8-eLhnL

saul / demofile