In this example player "Sobrijoska" and player "XoroTheWise" are shooting each other
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XoroTheWise is getting the first kill, and Sobrijoska is killing him after he already died.
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Note both players scored a kill and a death:
Sobrijoska still having only 12 kills (+-0) and 6 deaths (+1)
XoroTheWise got 7 kills (+1) and 5 deaths (+1)
This is a very common problem in the re spawn/death mechanic as the script is trying to assign the points for the kill to the player, but the player is no longer in a body, thus the points will not be transferred.
(This issue is hard and annoying to deal with, having that problem on our arma 3 CTI mission).
I didn't attached any logs as the problem is not related to the client, but to the mission mechanics.
Screw it here you can have em:
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