[shortguy]

Works Fine

public OnPluginStart() {
  HookEvent("player_death", Event_PlayerDeath);
}

public Action Timer_RespawnClient(Handle timer, int client) {
  CS_RespawnPlayer(client);
}

public Action Event_PlayerDeath(Handle event, const char[] name, bool dontBroadcast) 
{
  int userID = GetEventInt(event, "userid");
  int client = GetClientOfUserId(userID);
  if (!IsPlayerAlive(client)) {
    CreateTimer(0.000001, Timer_RespawnClient, client);    
  }
  return Plugin_Continue;
}

Fails to spawn correctly:

public OnPluginStart() {
  HookEvent("player_death", Event_PlayerDeath);
}

public Action Event_PlayerDeath(Handle event, const char[] name, bool dontBroadcast) 
{
  int userID = GetEventInt(event, "userid");
  int client = GetClientOfUserId(userID);
  if (!IsPlayerAlive(client)) {
    CS_RespawnPlayer(client);
  }
  return Plugin_Continue;
}