It's a very elaborate desync issue but usually in a server with more than 4 players using CJ's skin.
The following images show an example of this desync problem, the first screenshot is from Player #1's screen while the second screenshot shows the real location of Player #2 from his screen.
-Get 4 or more players using CJ's screen.
-Each player need to be streamed out, so basically teleport away or drive away.
-All players should meet up together again.
-Once they meet up, at least 1 or 2 players are desynced and appear to be standing still, no vehicle appears and the desynced players can kill the others with no consequences.